The Big Bang Theory
Overview
Leonard and Sheldon, two brilliant physicists, lead a life steeped in science and geek culture, sharing their days with fellow nerds Howard and Raj. Their routine takes an unexpected turn when Penny, a hopeful actress, becomes their new neighbor. Her presence introduces a dynamic shift in their tight-knit group, blending the worlds of intellect and charisma. As the four navigate friendship, romance, and various misadventures, they explore the complexities of relationships while embracing their quirks. The series brilliantly balances humor and heart, showcasing the challenges of connecting with others in a quirky, nerdy universe.
Episodes
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1
Pilot
Genius physicists Leonard and Sheldon encounter their new neighbor, Penny, who quickly reveals that despite their extensive knowledge of science, they...
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2
The Big Bran Hypothesis
Leonard decides to sign for a package to impress Penny, hoping to showcase his helpful side. However, when he brings Sheldon on board to assist him, h...
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3
The Fuzzy Boots Corollary
After discovering that Penny is in a relationship with someone else, Leonard decides to take a chance and asks another woman out on a date.
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4
The Luminous Fish Effect
After Sheldon is let go from his job, he finds himself contemplating life beyond the realm of physics. This unexpected situation leads Leonard to take...
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5
The Hamburger Postulate
Feeling discouraged about his relationship with Penny, Leonard finds himself drawn to Leslie, leading to an unexpected bond between them.
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6
The Middle-Earth Paradigm
Penny throws a Halloween bash, challenging Leonard, Sheldon, Wolowitz, and Koothrappali to navigate a fresh set of social hurdles.
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7
The Dumpling Paradox
With Wolowitz missing in action while hanging out with a friend, Penny steps in to take his place on the guys' Halo team.
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8
The Grasshopper Experiment
Raj's parents arrange a blind date for him, and he finally finds a connection with his date. However, just as he starts to feel comfortable, he realiz...
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9
The Cooper-Hofstadter Polarization
After receiving an invitation to present at a physics conference, Sheldon’s unwillingness to acknowledge Leonard’s contributions sparks a disagree...
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10
The Loobenfeld Decay
Leonard and Sheldon both come up with excuses to skip Penny's concert, but Sheldon's elaborate ruse ends up being more trouble than it's worth.
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11
The Pancake Batter Anomaly
Sheldon’s friends are well aware of his grumpy demeanor when he’s under the weather, which leads them to steer clear of him. Instead, Penny steps ...
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12
The Jerusalem Duality
Sheldon is on edge after encountering Dennis, a 15-year-old prodigy in physics who surpasses him in intellect. To ease Sheldon’s anxiety, Leonard st...
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13
The Bat Jar Conjecture
Sheldon is ousted from the Physics Bowl team and replaced by Leslie, which prompts him to create his own rival team to demonstrate his superiority.
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14
The Nerdvana Annihilation
After Penny explodes at Leonard due to yet another collectible arriving, he realizes it's time to break free from his obsession. Despite his friends' ...
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15
The Pork Chop Indeterminacy
The whole group becomes infatuated with Sheldon's twin sister, but Leonard's scheme to capture her affection goes off course when Sheldon steps in, in...
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16
The Peanut Reaction
Penny plans to organize a surprise party for Leonard, but her plans get derailed when Sheldon gets carried away during a trip to an electronics store.
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17
The Tangerine Factor
After Penny ends her relationship, Leonard finds the motivation he needs to finally ask her out. Meanwhile, both of them seek guidance from Sheldon as...
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1
The Bad Fish Paradigm
Penny's initial outing with Leonard takes an unexpected turn, leaving her feeling frustrated. In need of someone to talk to, she turns to Sheldon, who...
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2
The Codpiece Topology
Feeling envious of Penny’s new boyfriend, Leonard finds himself in a rebound fling with Leslie. As he navigates this unexpected relationship, he tri...
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3
The Barbarian Sublimation
Sheldon accidentally unleashes chaos when he introduces Penny to the world of online gaming, transforming her into a competitive gaming fanatic. As Pe...
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4
The Griffin Equivalency
After being mentioned in a magazine article, Raj's confidence skyrockets, leading him to pursue Penny with newfound boldness. Emboldened by the recogn...
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5
The Euclid Alternative
Leonard and his friends decide to hold an intervention aimed at helping Sheldon confront his anxiety about driving. They come together to encourage hi...
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6
The Cooper-Nowitzki Theorem
Sheldon and his friends are taken aback when a graduate student expresses an interest in him, leaving them puzzled by her unexpected attraction.
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7
The Panty Piñata Polarization
After Sheldon imposes a ban on Penny from the apartment due to a series of little rule violations, she plots her revenge.
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8
The Lizard-Spock Expansion
Leonard unintentionally captures the attention of the new woman who Wolowitz believes is his soulmate.
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9
The White Asparagus Triangulation
Sheldon is excited when Leonard begins a relationship with a woman who fits perfectly into his high expectations.
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10
The Vartabedian Conundrum
Leonard seeks Penny's guidance as his new romance begins to accelerate at an unexpected pace.
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11
The Bath Item Gift Hypothesis
Penny begins a relationship with Leonard's attractive coworker, leaving Leonard and his friends to endure the pain of Sheldon's fixation on the rules ...
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12
The Killer Robot Instability
Penny’s harsh words about Wolowitz’s love life send him into a tailspin, leading him to withdraw and avoid participating in the crucial robot batt...
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13
The Friendship Algorithm
Sheldon devises a systematic approach to forming friendships.
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14
The Financial Permeability
When Sheldon steps in to help Penny with her money troubles, it sparks a showdown between Leonard and Penny’s former boyfriend.
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15
The Maternal Capacitance
After a chaotic visit from Leonard's mother, he and Penny find themselves reconnecting in unexpected ways. The tension and awkwardness of the situatio...
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16
The Cushion Saturation
During a paintball match, tensions flare between Sheldon and Penny, resulting in a heated argument. Meanwhile, amidst the chaos, Leslie and Wolowitz f...
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17
The Terminator Decoupling
Leonard, Sheldon, and Wolowitz are thrilled to discover that a well-known science-fiction actress, Summer Glau, is traveling on the same train to San ...
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18
The Work Song Nanocluster
Penny’s small home business spirals into chaos when Sheldon steps in to manage things. What starts as a simple venture quickly becomes overwhelming ...
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19
The Dead Hooker Juxtaposition
Penny finds herself in competition with an attractive new female neighbor who has the potential to take her place as the building’s “new Penny.”
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20
The Hofstadter Isotope
When a fellow comic book fan shows interest in Penny, Leonard and Howard decide to check out the bar's Ladies' Night.
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21
The Vegas Renormalization
Leonard and Koothrappali take a devastated Wolowitz on a trip to Las Vegas to help lift his spirits. Meanwhile, Sheldon finds himself locked out of hi...
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22
The Classified Materials Turbulence
During Penny's second outing with Stuart, she makes a remark that rekindles Leonard's optimism about a potential romance with her. Meanwhile, Wolowitz...
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23
The Monopolar Expedition
When the guys decide to spend their summer working at the North Pole, Penny starts to reconsider her feelings for Leonard.
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1
The Electric Can Opener Fluctuation
After discovering that the guys altered the data from his Arctic expedition, Sheldon feels humiliated and departs for Texas. The others, concerned abo...
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2
The Jiminy Conjecture
Leonard and Penny find it challenging to navigate the aftermath of their clumsy first intimate encounter. Meanwhile, Sheldon and Howard engage in a wa...
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3
The Gothowitz Deviation
Howard and Raj head to a Goth nightclub in hopes of meeting women, while Sheldon works on creating an improved version of Penny by using a chocolate-b...
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4
The Pirate Solution
Raj faces the pressure of securing a new job to avoid returning to India. Meanwhile, Sheldon devises a plan to help him out, but this forces Leonard a...
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5
The Creepy Candy Coating Corollary
When Sheldon learns that Wil Wheaton is competing in a trading-card tournament, he becomes determined to join in as well. At the same time, Penny take...
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6
The Cornhusker Vortex
Sheldon takes on the role of Leonard's instructor in a bid to grasp the intricacies of football. Meanwhile, an unexpected mishap involving a kite puts...
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7
The Guitarist Amplification
When Leonard and Penny get into an argument, Sheldon steps in to mediate, but not out of a desire to help. Instead, his motivation stems from his own ...
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8
The Adhesive Duck Deficiency
While Leonard, Howard, and Raj are off camping in the desert, Penny finds herself injured and has no choice but to lean on Sheldon for support.
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9
The Vengeance Formulation
Following a humiliating experience on National Public Radio, Sheldon becomes determined to take revenge on Kripke. Meanwhile, Wolowitz is focused on n...
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10
The Gorilla Experiment
Penny seeks Sheldon's assistance to grasp the details of Leonard's research. Meanwhile, Wolowitz becomes envious as Leonard spends more time with his ...
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11
The Maternal Congruence
During a holiday visit, Leonard finds out that his mother has been withholding quite a bit of information from him, which she has shared with Sheldon....
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12
The Psychic Vortex
Leonard is shocked to discover that Penny has a belief in psychics. Meanwhile, Sheldon decides to help Koothrappali with his attempts to attract a gir...
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13
The Bozeman Reaction
After their apartment gets burglarized, Leonard and Sheldon enlist the help of their friends to design a cutting-edge security system.
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14
The Einstein Approximation
Sheldon embarks on a quest to solve a challenging physics problem, which unexpectedly lands him a job at the Cheesecake Factory alongside Penny.
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15
The Large Hadron Collision
On Valentine's Day, Leonard has the opportunity to take one guest with him on a trip to Switzerland to visit CERN's Large Hadron Collider, the largest...
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16
The Excelsior Acquisition
Sheldon finds himself in traffic court after receiving a ticket due to Penny's actions.
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17
The Precious Fragmentation
While browsing a garage sale, the guys stumble upon a ring from "The Lord of the Rings," but its presence soon begins to create tension among them. As...
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18
The Pants Alternative
When Sheldon finds himself paralyzed by his anxiety over public speaking, his friends rally around him to help overcome this obstacle that threatens t...
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19
The Wheaton Recurrence
Leonard and Penny find themselves in a heated argument that puts their relationship at risk, while Sheldon faces off against Wil Wheaton in an intense...
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20
The Spaghetti Catalyst
With Leonard and Penny in a silent standoff, Sheldon takes drastic measures to ensure that both of them remain content.
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21
The Plimpton Stimulation
Leonard and Sheldon find themselves vying for the interest of a renowned female physicist. As they both attempt to impress her with their knowledge an...
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22
The Staircase Implementation
Leonard shares with Penny the story of his first encounter with Sheldon and reveals the incident that led to the elevator’s current state. He recoun...
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23
The Lunar Excitation
Penny is concerned that her relationship with Leonard has left her unable to connect with typical guys. Meanwhile, Wolowitz and Koothrappali embark on...
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1
The Robotic Manipulation
Penny decides to join Sheldon on his very first date, eager to witness how it unfolds. Meanwhile, Wolowitz discovers a creative way to utilize a robot...
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2
The Cruciferous Vegetable Amplification
Facing the grim reality that he won’t survive long enough to upload his consciousness into a robotic body, Sheldon sets out on a quest to find ways ...
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3
The Zazzy Substitution
The guys begin to worry when Sheldon embarks on a quest to find a substitute for human connection.
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4
The Hot Troll Deviation
Wolowitz's cringe-worthy secret is exposed, causing quite a stir among his friends. Meanwhile, Sheldon and Raj engage in a light-hearted rivalry at th...
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5
The Desperation Emanation
Leonard comes to the unsettling conclusion that he’s the only member of his friend group who isn’t in a relationship, prompting feelings of insecu...
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6
The Irish Pub Formulation
Leonard is hiding a secret affair from Sheldon, Howard, and Raj.
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7
The Apology Insufficiency
During an FBI interview, Sheldon's responses endanger Wolowitz's security clearance.
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8
The 21-Second Excitation
As the guys wait in line for a highly anticipated movie premiere, Penny and Bernadette take the opportunity to invite Amy to join them for her very fi...
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9
The Boyfriend Complexity
Penny requests Leonard to deceive her father, while Howard, Raj, and Bernadette spend the night observing the stars through a telescope.
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10
The Alien Parasite Hypothesis
Amy discovers she has romantic feelings for Penny's former boyfriend, creating an awkward situation. Meanwhile, Koothrappali and Wolowitz engage in a ...
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11
The Justice League Recombination
The guys discover a fantastic way to utilize Penny's new boyfriend, Zack, when they decide to enter a costume contest dressed as the Justice League.
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12
The Bus Pants Utilization
When Leonard pitches his concept for a smartphone app, it unintentionally strains his friendship with Sheldon. As Leonard becomes more invested in the...
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13
The Love Car Displacement
While at a science event with Wolowitz, Bernadette unexpectedly encounters her former boyfriend.
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14
The Thespian Catalyst
In an effort to enhance his teaching skills, Sheldon enlists Penny to provide him with acting lessons. Meanwhile, Raj finds himself daydreaming about ...
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15
The Benefactor Factor
When a generous benefactor supports the university, Leonard finds himself reflecting on the lengths he might go to in pursuit of scientific advancemen...
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16
The Cohabitation Formulation
While Wolowitz considers advancing his relationship with Bernadette, Leonard finds himself reconnecting with Raj's sister.
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17
The Toast Derivation
Sheldon grows uneasy as he notices that everyone is spending time at Raj's apartment and realizes that Leonard has become the focal point of their gat...
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18
The Prestidigitation Approximation
Sheldon is perplexed by the magic trick performed by Wolowitz. At the same time, Leonard comes to the unsettling conclusion that his relationship with...
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19
The Zarnecki Incursion
Sheldon’s online gaming account gets compromised by Todd Zarnecki, who swipes all of his belongings. This leads the guys on a mission to get everyth...
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20
The Herb Garden Germination
Sheldon and Amy choose to spread a few rumors about their friends as an experiment. In the meantime, Howard decides to elevate his relationship with B...
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21
The Agreement Dissection
After Leonard spends an excessive amount of time in the shower with Priya, Sheldon accuses him of violating their roommate agreement twice. However, P...
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22
The Wildebeest Implementation
Raj tries to overcome his social anxiety, seeking ways to gain confidence in social situations. Meanwhile, Penny enlists Bernadette's help to keep an ...
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23
The Engagement Reaction
When Howard finally tells his mother that he’s engaged to Bernadette, the shock hits her hard and she ends up in the hospital.
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24
The Roommate Transmogrification
After Bernadette earns her PhD, Wolowitz struggles with feelings of inadequacy. Meanwhile, Raj and Leonard decide to switch roles for a while, leading...
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1
The Skank Reflex Analysis
Penny is anxious about the impact her night with Raj will have on her friendships with the guys. Meanwhile, Sheldon steps up to take charge of the pai...
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2
The Infestation Hypothesis
When Sheldon and Penny get into a heated argument, Amy finds herself stuck in the middle of their conflict. Meanwhile, Leonard is determined to add so...
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3
The Pulled Groin Extrapolation
Leonard and Amy take the opportunity to deepen their connection, sharing more about themselves. Meanwhile, Howard and Bernadette dedicate their weeken...
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4
The Wiggly Finger Catalyst
Penny takes on the role of matchmaker for Raj, leading him to meet a girl with whom he feels at ease conversing.
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5
The Russian Rocket Reaction
Sheldon and Leonard receive an invitation to a gathering at Wil Wheaton's residence, while Howard stumbles upon an extraordinary chance that’s truly...
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6
The Rhinitis Revelation
Mary Cooper, Sheldon’s mother, pays a visit, but Sheldon becomes frustrated when she chooses to interact with his friends instead of focusing solely...
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7
The Good Guy Fluctuation
A charming comic book illustrator challenges Leonard and Priya's relationship, putting it under scrutiny. Meanwhile, Sheldon takes it upon himself to ...
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8
The Isolation Permutation
Amy is devastated to find out that Penny and Bernadette went wedding dress shopping without inviting her.
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9
The Ornithophobia Diffusion
Leonard and Penny decide to spend time together as friends on what they label a 'non-date,' but their efforts quickly turn into a competition to sabot...
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10
The Flaming Spittoon Acquisition
When Stuart invites Amy on a date, Sheldon is forced to face his emotions and reflect on the future of his relationship with her.
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11
The Speckerman Recurrence
Leonard finds himself confronting his past when he receives a message from his former high school bully. As old memories resurface, he struggles to de...
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12
The Shiny Trinket Maneuver
Sheldon finds himself in hot water with Amy after he fails to show enthusiasm for her latest achievement. Meanwhile, Howard faces a reality check as h...
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13
The Recombination Hypothesis
After ending things with Priya, Leonard impulsively invites Penny to join him for a romantic dinner. As they share the evening together, the two find ...
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14
The Beta Test Initiation
Leonard and Penny contemplate rekindling their romance, while Raj discovers he can hold a conversation with a "woman" without needing alcohol—thanks...
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15
The Friendship Contraction
Sheldon’s self-centered requests make Leonard question the strength of their friendship. At the same time, Wolowitz is on a quest to choose the perf...
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16
The Vacation Solution
Sheldon is compelled to take a vacation, so he joins Amy at her neurobiology lab, where he dives into her work.
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17
The Rothman Disintegration
Sheldon engages in a fierce competition with Kripke for a highly sought-after office at the university. Meanwhile, Penny is surprised when she receive...
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18
The Werewolf Transformation
Sheldon gets frustrated when his usual barber is unavailable due to illness. Meanwhile, Howard begins to have second thoughts about his desire to trav...
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19
The Weekend Vortex
Sheldon faces a dilemma: he can either attend Amy's aunt's birthday celebration or spend the entire weekend gaming with his friends.
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20
The Transporter Malfunction
Penny gifts Leonard and Sheldon some "Star Trek" memorabilia to show her appreciation, which causes Sheldon to be visited by the spirit of Mr. Spock. ...
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21
The Hawking Excitation
When Wolowitz has the chance to collaborate with Stephen Hawking, Sheldon becomes determined to do whatever it takes to meet his idol.
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22
The Stag Convergence
Following the bachelor party thrown for Howard by the guys, Bernadette begins to have doubts about their upcoming marriage when she discovers details ...
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23
The Launch Acceleration
As NASA accelerates Howard's mission timeline, he finds himself confronting his anxieties and the formidable presence of Bernadette's father, putting ...
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24
The Countdown Reflection
As the fifth season wraps up, Howard and Bernadette make the choice to tie the knot before his upcoming NASA mission, prompting the group to spring in...
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1
The Date Night Variable
As Raj watches his friends enjoy their dates, he grapples with feelings of isolation. Meanwhile, Wolowitz finds himself stuck in the middle of a confl...
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2
The Decoupling Fluctuation
Upon discovering that Penny is contemplating ending her relationship with Leonard, Sheldon steps in to try to prevent the breakup. At the same time, H...
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3
The Higgs Boson Observation
Amy becomes uneasy when Sheldon brings on a young female assistant, leading to feelings of insecurity. Meanwhile, the challenges of space travel begin...
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4
The Re-Entry Minimization
Upon Wolowitz's return from his space mission, he finds himself far from the hero's reception he had anticipated. At the same time, Game Night escalat...
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5
The Holographic Excitation
The group gathers at Stuart's comic book shop to enjoy a Halloween celebration. At the same time, Leonard works his charm on Penny, captivating her wi...
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6
The Extract Obliteration
Sheldon finds his bond with Stephen Hawking at risk due to a heated game of “Words with Friends,” creating tension between the two. Meanwhile, Pen...
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7
The Habitation Configuration
Wolowitz faces the challenge of leaving his mother’s home. At the same time, Sheldon finds himself stuck in the crossfire of a dispute between Amy a...
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8
The 43 Peculiarity
Raj and Howard become curious about Sheldon's daily disappearance at 2:45 PM and set out to uncover the reason behind it. Meanwhile, tensions flare in...
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9
The Parking Spot Escalation
When the University decides to give Sheldon’s parking space to Wolowitz, the ensuing conflict creates tension among the entire group.
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10
The Fish Guts Displacement
When Amy falls ill, Sheldon takes it upon himself to care for her and help her recover. Meanwhile, Wolowitz and his father-in-law make arrangements fo...
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11
The Santa Simulation
While playing a game of Dungeons and Dragons, Sheldon reflects on his past Christmas experiences. Meanwhile, Amy, Penny, and Bernadette team up to hel...
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12
The Egg Salad Equivalency
After Sheldon faces allegations of sexual harassment, he inadvertently drags Raj, Leonard, and Howard into a precarious situation.
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13
The Bakersfield Expedition
The guys gear up in their costumes for a road trip to a comic book convention, while the ladies opt to stay behind and tackle the challenge of underst...
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14
The Cooper/Kripke Inversion
Sheldon experiences a serious blow to his self-esteem when he has to team up with his arch-rival, Barry Kripke. Meanwhile, Raj and Howard indulge thei...
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15
The Spoiler Alert Segmentation
When Sheldon and Leonard have a falling out, it disrupts the living situations of Amy and Penny. Meanwhile, with Howard out of town, Raj steps in to l...
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16
The Tangible Affection Proof
The guys embark on a quest to find the ideal Valentine's Day presents for their partners. Meanwhile, Stuart and Raj decide to throw a "lonely hearts" ...
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17
The Monster Isolation
Following a disastrous date, Koothrappali resolves to stay cooped up in his apartment indefinitely. Meanwhile, Penny showcases her acting talents, whi...
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18
The Contractual Obligation Implementation
Leonard, Sheldon, and Howard host science lectures for junior high students, sharing their knowledge and enthusiasm. Meanwhile, the girls skip out on ...
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19
The Closet Reconfiguration
Howard grapples with the decision of whether to open a letter he received from his father. Meanwhile, Penny and Leonard throw a sophisticated cocktail...
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20
The Tenure Turbulence
The girls find themselves drawn into the drama when Leonard, Sheldon, and Raj vie for a tenure position at the University.
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21
The Closure Alternative
Amy attempts to assist Sheldon in overcoming his obsessive need for resolution after one of his beloved TV series gets canceled. Meanwhile, Raj uncove...
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22
The Proton Resurgence
Leonard and Sheldon enlist their beloved childhood TV show host, Bob Newhart, to put on a performance for them. Meanwhile, Bernadette and Howard face ...
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23
The Love Spell Potential
Raj and Lucy's date pushes them beyond their usual boundaries. When their Las Vegas getaway takes an unexpected turn, the girls decide to participate ...
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24
The Bon Voyage Reaction
Leonard gets an incredible chance to take a job abroad, leaving Penny and Sheldon surprised and uncertain about the changes it might bring. Meanwhile,...
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1
The Hofstadter Insufficiency
While Leonard is out of town, Sheldon and Penny bond over personal revelations, deepening their friendship. Meanwhile, Wolowitz steps in to support Ra...
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2
The Deception Verification
Leonard and Sheldon face challenges that put their friendship to the test, while Howard's recent attempt to assist his mother leads to unexpectedly ch...
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3
The Scavenger Vortex
As the whole group takes part in a scavenger hunt created by Raj, their true colors shine through, revealing both their strengths and their flaws.
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4
The Raiders Minimization
Sheldon becomes upset with Amy for spoiling one of his beloved films. Meanwhile, Raj and Stuart work on enhancing their online dating profiles to attr...
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5
The Workplace Proximity
Amy begins her job at Caltech, leading to tension between her and Sheldon. Howard sides with Sheldon on the matter, bringing it up to Bernadette, whic...
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6
The Romance Resonance
After achieving a significant scientific milestone, Sheldon grapples with feelings of impostor syndrome. Meanwhile, a sweet romantic surprise from How...
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7
The Proton Displacement
Sheldon feels slighted when Arthur "Professor Proton" Jeffries turns to Leonard for assistance on a project instead of him, prompting him to plot reve...
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8
The Itchy Brain Simulation
After a blunder is revealed, Sheldon insists that Leonard experience his perspective by making him walk a mile in his shoes. Meanwhile, Penny takes it...
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9
The Thanksgiving Decoupling
Sheldon resists as his friends insist on taking him to Mrs. Wolowitz’s house for Thanksgiving. At the same time, Penny and Leonard confront an error...
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10
The Discovery Dissipation
Leonard faces the consequences of challenging Sheldon's latest scientific breakthrough. Meanwhile, Raj moves in with Howard and Bernadette for a week,...
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11
The Cooper Extraction
As Sheldon spends time back home in Texas, the rest of the group comes together to decorate the Christmas tree in their apartment. During this festive...
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12
The Hesitation Ramification
After Penny's major role on NCIS turns out to be a disappointment, Leonard finds himself at a loss on how to support her, prompting Penny to pose a da...
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13
The Occupation Recalibration
Sheldon attempts to unwind after being compelled to take a break from work. At the same time, Leonard finds it challenging to support Penny following ...
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14
The Convention Conundrum
When the guys fail to secure tickets to Comic-Con, Sheldon decides to host his own convention and ends up having an unforgettable night with James Ear...
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15
The Locomotive Manipulation
On Valentine's Day, Sheldon and Amy hop on a train to Napa Valley with Howard and Bernadette. Meanwhile, Leonard and Penny find themselves in a bit of...
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16
The Table Polarization
Leonard purchases a new dining room table, prompting Sheldon to reflect on the shifts happening in his life. At the same time, Wolowitz receives an op...
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17
The Friendship Turbulence
Following a disagreement with Sheldon, Howard seeks to patch things up by inviting him to the NASA headquarters in Houston. Meanwhile, Penny begins to...
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18
The Mommy Observation
Sheldon heads to Houston to see his mother, where he faces some unexpected truths. At the same time, Raj's 'Murder Mystery' party stirs up conflicts a...
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19
The Indecision Amalgamation
Raj feels overwhelmed with guilt as he juggles dating two women simultaneously. Meanwhile, Penny grapples with the decision of whether to accept a par...
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20
The Relationship Diremption
Sheldon finds himself in a dilemma when he comes to the conclusion that he's squandering his efforts on string theory. At the same time, a double date...
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21
The Anything Can Happen Recurrence
In anticipation of his date with Emily, Howard introduces Raj to the world of horror films. Meanwhile, Penny and Sheldon are taken aback when they fin...
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22
The Proton Transmogrification
While the group enjoys their Star Wars Day festivities, Sheldon struggles to cope with the recent passing of Arthur "Professor Proton" Jeffries.
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23
The Gorilla Dissolution
After a particularly tough day, Penny finds herself reconsidering her life decisions, particularly regarding Leonard. At the same time, Howard and Ber...
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24
The Status Quo Combustion
Sheldon becomes frustrated with his career, the recent closure of the comic book store, and the uncertain future of Leonard and Penny’s living situa...
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1
The Locomotion Interruption
Leonard and Amy embark on a spontaneous journey to Arizona to bring Sheldon back home. Meanwhile, Penny prepares for a job interview at Bernadette's w...
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2
The Junior Professor Solution
Sheldon finds himself obligated to lead a class as a Junior Professor, prompting Howard to sign up for it. At the same time, Amy navigates the growing...
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3
The First Pitch Insufficiency
Wolowitz is anxious about being invited to toss the ceremonial first pitch at a Los Angeles Angels game. Meanwhile, Penny and Leonard are determined t...
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4
The Hook-Up Reverberation
Raj's commitment to honesty backfires when his new girlfriend treats Penny poorly. Meanwhile, the guys contemplate the idea of co-owning Stuart's comi...
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5
The Focus Attenuation
The girls embark on a weekend adventure in Las Vegas, eager for excitement and entertainment. Meanwhile, the guys set out to create something innovati...
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6
The Expedition Approximation
Sheldon and Raj put their survival skills to the test by mimicking the conditions of a dark-matter research trip in a salt mine, using a steam tunnel ...
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7
The Misinterpretation Agitation
The guys step in to assist Penny with an uncomfortable situation at work when an infatuated doctor arrives at her doorstep, a result of her overly eff...
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8
The Prom Equivalency
The girls plan to recreate their high school prom experience with the guys. As Sheldon grapples with the pressure of deepening his commitment to Amy, ...
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9
The Septum Deviation
After Leonard undergoes a small procedure on his nose, it’s Sheldon who finds himself craving attention and sympathy from everyone. At the same time...
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10
The Champagne Reflection
As Sheldon bids an emotional farewell to the last episode of "Fun with Flags," Leonard, Howard, and Raj delve into a deceased professor's research, ho...
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11
The Clean Room Infiltration
When a work crisis hits the university, Leonard and Howard find themselves at odds, nearly fighting as they point fingers at each other. They reach ou...
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12
The Space Probe Disintegration
Howard makes an effort to take Raj’s mind off his nerves as he awaits crucial information from a space probe he contributed to launching. At the sam...
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13
The Anxiety Optimization
Sheldon finds himself in a creative slump, prompting his friends to intervene by trying to increase his stress levels. Meanwhile, Howard playfully rib...
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14
The Troll Manifestation
Leonard and Sheldon release a research paper that gains broad approval, but they can't shake off the negative feedback from an online troll. Meanwhile...
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15
The Comic Book Store Regeneration
As preparations ramp up for the grand reopening of Stuart's comic book store, Howard is hit with unexpected news. Meanwhile, Penny attempts to help Sh...
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16
The Intimacy Acceleration
Sheldon and Penny embark on a playful experiment aimed at inducing romantic feelings in its participants. Meanwhile, Leonard, Amy, Raj, and Emily find...
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17
The Colonization Application
During a visit to the pet store, tensions rise when Amy discovers that Sheldon has signed up for a one-way mission to Mars. In another part of town, L...
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18
The Leftover Thermalization
Tension rises when a magazine neglects to credit Leonard in an article featuring the paper he collaborated on with Sheldon. Meanwhile, a power outage ...
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19
The Skywalker Incursion
Leonard and Sheldon get the chance to speak at UC Berkeley, but they decide to make a stop along the way in hopes of meeting a personal hero. Meanwhil...
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20
The Fortification Implementation
As Sheldon and Amy construct a blanket fort, they face significant decisions about their relationship. At the same time, Howard discovers he has a hal...
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21
The Communication Deterioration
Raj is tasked with crafting a message for when NASA potentially finds alien life, leading to a heated debate among the guys about what he should say. ...
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22
The Graduation Transmission
Howard begins to doubt his engineering skills when he and Sheldon struggle to get a toy drone airborne. At the same time, Leonard faces the risk of mi...
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23
The Maternal Combustion
Sheldon and Leonard's mothers come together, leading to a clash of personalities. At the same time, Howard makes the decision to step up and contribut...
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24
The Commitment Determination
Sheldon pushes Leonard and Penny to finalize their wedding date, but in the midst of this, his own relationship with Amy undergoes significant transfo...
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1
The Matrimonial Momentum
While on their way to Las Vegas for their wedding, Penny grapples with Leonard's revelation that he kissed someone else. Meanwhile, Sheldon finds hims...
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2
The Separation Oscillation
Leonard faces the woman he shared a kiss with by the North Sea, hoping to reassure Penny. Meanwhile, Sheldon decides to record a unique episode of "Fu...
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3
The Bachelor Party Corrosion
During Leonard's bachelor party weekend in Mexico, the guys face a challenge when they end up with a flat tire, putting their science prowess to the t...
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4
The 2003 Approximation
Sheldon discovers that his living situation is about to change, prompting him to wish for a return to 2003, a more straightforward time before he met ...
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5
The Perspiration Implementation
The guys attend a fencing class led by Barry Kripke, which puts Sheldon in an uncomfortable spot when Kripke shows a romantic interest in Amy. Meanwhi...
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6
The Helium Insufficiency
Amid a critical helium shortage sweeping the country, Sheldon and Leonard resort to extreme tactics to secure the helium they require. Meanwhile, Penn...
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7
The Spock Resonance
Wil Wheaton conducts an interview with Sheldon for a Star Trek documentary, during which Sheldon discloses the engagement ring he has for Amy and shar...
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8
The Mystery Date Observation
Sheldon, Wolowitz, and Koothrappali create an online ad in hopes of finding Sheldon a new romantic partner. Meanwhile, when Amy is secretive about her...
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9
The Platonic Permutation
Sheldon and Amy decide to spend Thanksgiving together at the aquarium, attempting to enjoy each other's company as friends. Meanwhile, Wolowitz is hes...
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10
The Earworm Reverberation
Sheldon has an epiphany about why a particular song won't leave his mind. Meanwhile, Amy decides to invite Dave over for dinner, putting aside the mem...
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11
The Opening Night Excitation
After dating for over five years, Sheldon and Amy finally share their first night together. Meanwhile, Leonard, Wolowitz, and Koothrappali find themse...
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12
The Sales Call Sublimation
Penny finds herself in over her head when Leonard decides to see a psychiatrist for her. Meanwhile, Sheldon and Koothrappali team up to make an exciti...
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13
The Empathy Optimization
After handling ailing Sheldon, Leonard, Penny, and the rest of the group decide to indulge in a weekend without his presence.
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14
The Meemaw Materialization
When Meemaw encounters Amy, the atmosphere is anything but cordial. Meemaw clearly has some unresolved issues with her. Sheldon steps in to stand up f...
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15
The Valentino Submergence
Sheldon and Amy celebrate Valentine's Day by broadcasting a special live episode of Fun with Flags. Meanwhile, Leonard and Penny confront the realitie...
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16
The Positive Negative Reaction
When the group learns that Bernadette is expecting, they kick off the celebration with a karaoke session. Meanwhile, Bernadette grows worried as Wolow...
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17
The Celebration Experimentation
After being together for over nine years, the group finally throws a surprise birthday party for Sheldon, inviting a special guest to join in the cele...
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18
The Application Deterioration
Leonard, Sheldon, and Wolowitz encounter difficulties as they attempt to secure a patent for their infinite persistence gyroscope. Meanwhile, Penny, A...
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19
The Solder Excursion Diversion
Amy is taken aback when Sheldon shares a surprising secret after she gifts him a new laptop. Meanwhile, Koothrappali betrays Leonard and Wolowitz by e...
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20
The Big Bear Precipitation
During a weekend getaway at a cabin, Sheldon accidentally reveals one of Leonard's secrets in front of Penny and Amy. Meanwhile, Koothrappali gets a b...
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21
The Viewing Party Combustion
During a gathering, a minor disagreement between Leonard and Sheldon escalates into a full-blown confrontation, prompting everyone to take sides.
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22
The Fermentation Bifurcation
The group visits a wine bar and unexpectedly bumps into Penny's ex-boyfriend, Zack. Meanwhile, Bernadette finds herself spending the night with Sheldo...
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23
The Line Substitution Solution
Sheldon enlists Stuart to keep Amy company for the day, as he prefers to attend a movie screening instead. Meanwhile, Leonard’s mother, Beverly, arr...
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24
The Convergence Convergence
Things take a wild turn when Leonard’s newly divorced parents, Alfred and Beverly, arrive in town, along with Sheldon’s deeply religious mother, M...
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1
The Conjugal Conjecture
Following a night spent together by Sheldon’s mother and Leonard's father, the group faces an uncomfortable morning filled with tension. Meanwhile, ...
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2
The Military Miniaturization
Colonel Williams, an Air Force official from the Department of Material Command, meets with Wolowitz for a discussion.
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3
The Dependence Transcendence
As the deadline for their government project looms, the boys find themselves increasingly stressed, especially when Sheldon resorts to an energy drink...
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4
The Cohabitation Experimentation
After Amy's apartment experiences a flood, she suggests a "cohabitation experiment" with Sheldon. Meanwhile, Howard and Bernadette are frustrated when...
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5
The Hot Tub Contamination
When Sheldon and Amy's living arrangement takes a turn for the worse, Leonard and Penny find themselves in the middle of their escalating argument. Te...
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6
The Fetal Kick Catalyst
While attending the Van Nuys Comic Con with Leonard, Penny is taken aback to discover that she has fans who appreciated her role in "Serial Ape-ist." ...
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7
The Veracity Elasticity
To keep her arrangement with Sheldon intact, Amy deceives him by claiming that repairs are being done on her apartment. They decide to film a special ...
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8
The Brain Bowl Incubation
Following a groundbreaking experiment that merges their DNA, Sheldon is determined to persuade Amy that they should have children together. Meanwhile,...
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9
The Geology Elevation
Bert, a geologist at Caltech, receives the prestigious MacArthur Genius fellowship, sparking intense jealousy in Sheldon. Meanwhile, Wolowitz stumbles...
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10
The Property Division Collision
Sheldon and Leonard attempt to split their shared possessions, but their differing opinions lead to constant disagreements. Meanwhile, Koothrappali an...
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11
The Birthday Synchronicity
Howard and Bernadette joyfully introduce their newborn to the world, while Sheldon and Amy come together to honor Amy’s birthday with a special cele...
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12
The Holiday Summation
Sheldon and Amy drop by Leonard and Penny's place for the first time after the holiday season, eager to recount their disastrous trip to Texas. As the...
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13
The Romance Recalibration
Penny starts to sense that Leonard isn't appreciating her as he should, prompting her to plan a spa getaway with Amy. Meanwhile, Wolowitz and Koothrap...
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14
The Emotion Detection Automation
Sheldon tries out a new MIT gadget designed to enhance his ability to interpret others' emotions. Meanwhile, Leonard struggles to conceal his feelings...
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15
The Locomotion Reverberation
Leonard and Wolowitz come up with a plan to keep Sheldon occupied, as his meticulous nature is hindering their work on the guidance system. Meanwhile,...
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16
The Allowance Evaporation
Sheldon and Amy experience their first argument after moving in as a couple, leading to some unexpected tensions. Meanwhile, Koothrappali is taken aba...
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17
The Comic-Con Conundrum
After Koothrappali finds himself without access to his father's wealth, he turns to Sheldon for assistance in tackling his financial troubles. Meanwhi...
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18
The Escape Hatch Identification
After Raj decides to leave his apartment, Leonard and Penny extend an invitation for him to take over Sheldon's former room.
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19
The Collaboration Fluctuation
Leonard, Penny, and Raj navigate the dynamics of their new living situation, while Sheldon becomes intrigued by Amy’s research.
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20
The Recollection Dissipation
Sheldon challenges himself by taking on projects with Leonard and Wolowitz, while also working alongside Amy, all in one day. Meanwhile, Bernadette is...
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21
The Separation Agitation
As Bernadette heads back to work, both she and Howard struggle with the idea of leaving Halley at daycare. Meanwhile, Bert excitedly introduces his ne...
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22
The Cognition Regeneration
Leonard feels uneasy when Penny contemplates accepting a job from her former boyfriend, Zack.
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23
The Gyroscopic Collapse
After Leonard, Sheldon, and Wolowitz toast to their successful completion of a classified air force project, they encounter an unexpected setback. Mea...
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24
The Long Distance Dissonance
The group grows worried when Dr. Ramona Nowitzki, one of Sheldon’s past crushes, reappears just as Amy is off at Princeton.
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1
The Proposal Proposal
As the eleventh season kicks off, Amy responds to Sheldon's proposal, providing him with a pivotal answer. Meanwhile, Howard and Bernadette find thems...
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2
The Retraction Reaction
Leonard causes a stir at the university and among the physics community when he gives a cringe-worthy interview. Meanwhile, Amy and Bernadette find co...
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3
The Relaxation Integration
Sheldon and Amy find it difficult to settle on a wedding date, leading to increased stress for Sheldon, who starts sleep-talking. At the same time, Ra...
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4
The Explosion Implosion
Howard feels anxious about becoming a father, so he and Sheldon strengthen their friendship by working together to build a model rocket. At the same t...
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5
The Collaboration Contamination
When Sheldon and Raj find themselves struggling with Amy and Howard collaborating on a science project, they turn to Bernadette for support. Meanwhile...
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6
The Proton Regeneration
Sheldon faces off against Wil Wheaton in a competition for the part of the new Professor Proton. Meanwhile, Penny takes on the responsibility of looki...
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7
The Geology Methodology
Sheldon teams up with Bert for a research project, even though he feels a bit uncomfortable about it. Meanwhile, Penny and Bernadette step in to help ...
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8
The Tesla Recoil
Leonard and Howard are livid when they find out that Sheldon secretly collaborated with the military without telling them. Meanwhile, while Bernadette...
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9
The Bitcoin Entanglement
Sheldon attempts to show the guys a lesson when they exclude him from a promising Bitcoin investment opportunity. Meanwhile, an old video from seven y...
-
10
The Confidence Erosion
Sheldon and Amy attempt to ease the pressures of wedding planning by incorporating mathematical strategies into their approach. Meanwhile, Raj confron...
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11
The Celebration Reverberation
As Raj and Howard's rivalry heats up, the group is busy organizing Halley's first birthday celebration. Meanwhile, Sheldon's grand surprise for Amy's ...
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12
The Matrimonial Metric
Sheldon and Amy set out to choose their Best Man and Maid of Honor by conducting a series of experiments on their friends. They devise various scenari...
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13
The Solo Oscillation
After Sheldon sends Amy away to focus on his work independently, she and Leonard grow closer while conducting a variety of science experiments togethe...
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14
The Separation Triangulation
Raj gets caught in a whirlwind of domestic turmoil when he discovers that the woman he’s seeing has an extremely angry husband. Meanwhile, Sheldon d...
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15
The Novelization Correlation
Leonard's book prompts some intriguing questions, while Amy makes a special appearance on the latest episode of the Professor Proton show.
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16
The Neonatal Nomenclature
As Bernadette delays going into labor, the group brainstorms various methods to kickstart the process. Meanwhile, Howard takes the opportunity to conf...
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17
The Athenaeum Allocation
Leonard goes to great lengths to ensure Sheldon and Amy find the ideal location for their wedding. Meanwhile, Bernadette and Howard struggle to figure...
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18
The Gates Excitation
When Bill Gates drops by Penny's workplace, the group hatches a plan to catch a glimpse of him, leading to a series of comical misadventures. At the s...
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19
The Tenant Disassociation
Upon discovering that Sheldon is the president of the tenants association, Leonard resolves to challenge him for the position. Meanwhile, Bernadette m...
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20
The Reclusive Potential
Doctor Wolcott, a genius yet introverted scientist, extends an invitation to Sheldon for a getaway at his remote cabin, and Leonard, Raj, and Howard d...
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21
The Comet Polarization
When renowned writer Neil Gaiman gives a shout-out to Stuart's comic book store, it transforms the shop's reputation overnight. Meanwhile, tensions ri...
-
22
The Monetary Insufficiency
Sheldon heads to Las Vegas with the goal of striking it rich for scientific research. Meanwhile, Penny and Bernadette accompany Amy on a wedding dress...
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23
The Sibling Realignment
Sheldon discovers that his mother will only come to his wedding if he includes his brother, Georgie, on the guest list. To resolve this family rift, h...
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24
The Bow Tie Asymmetry
As Amy's parents and Sheldon's family show up, everyone is preoccupied with ensuring that every detail of the wedding is perfect—everyone, that is, ...
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1
The Conjugal Configuration
Sheldon and Amy's honeymoon hits a snag in New York City. Meanwhile, Penny and Leonard realize just how much they mirror Amy's parents, which makes th...
-
2
The Wedding Gift Wormhole
Sheldon and Amy become increasingly frustrated as they attempt to decipher the 'perfect gift' that Leonard and Penny presented to them on their weddin...
-
3
The Procreation Calculation
The Wolowitz household becomes more chaotic when Stuart introduces his new girlfriend. Meanwhile, Penny and Leonard engage in a heartfelt discussion a...
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4
The Tam Turbulence
Sheldon refuses to share the reason behind his silence about his childhood best friend, prompting Leonard to take action. Meanwhile, Bernadette and Pe...
-
5
The Planetarium Collision
With Amy too busy to focus on super-asymmetry, Sheldon takes drastic measures to free up her schedule, even if it unintentionally jeopardizes her care...
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6
The Imitation Perturbation
Howard decides to don a Sheldon costume for Halloween, prompting Sheldon to plot his revenge during Leonard and Penny's Halloween gathering. Meanwhile...
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7
The Grant Allocation Derivation
Leonard finds himself in a tough spot as he has to manage the allocation of additional grant funds. Meanwhile, Bernadette transforms the backyard play...
-
8
The Consummation Deviation
Sheldon makes an effort to connect with Amy's dad, but when Howard distracts Mr. Fowler with his magic tricks, Sheldon is left to interact with Mrs. F...
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9
The Citation Negation
Sheldon and Amy are heartbroken to discover through a Russian publication that the concept of Super Asymmetry has been previously proposed and rejecte...
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10
The VCR Illumination
Sheldon and Amy remain discouraged after their theory gets debunked, but a nostalgic VHS tape from Sheldon's youth reignites his determination. Meanwh...
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11
The Paintball Scattering
Penny and Leonard set up a paintball match that spirals into chaos when Sheldon becomes envious of Amy's attention. Meanwhile, Raj stumbles upon Anu w...
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12
The Propagation Proposition
Penny unexpectedly encounters her former boyfriend, Zack, who extends an invitation for her and Leonard to join him and his new wife for dinner. After...
-
13
The Confirmation Polarization
Sheldon and Amy are overjoyed when their super asymmetry theory receives validation from two physicists, but their excitement quickly turns sour as th...
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14
The Meteorite Manifestation
Sheldon is excited to assist Bernadette and Wolowitz with their daunting paperwork, but his enthusiasm wanes when he realizes they’re engaging in il...
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15
The Donation Oscillation
Penny makes a move to entice Leonard, hoping to sabotage his contribution meant for her ex, Zack, and his wife, Marissa. Meanwhile, Wolowitz, Bernadet...
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16
The D & D Vortex
The group discovers that Wil Wheaton is hosting a star-studded Dungeons and Dragons session featuring William Shatner, Joe Manganiello, Kareem Abdul-J...
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17
The Conference Valuation
Penny and Bernadette head to San Diego for a pharmaceutical sales convention, leaving Wolowitz in charge of their children. Meanwhile, Sheldon stumble...
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18
The Laureate Accumulation
As rivals Pemberton and Campbell win over the American public during a promotional tour, Sheldon and Amy work to sway Nobel Prize winners Kip Thorne, ...
-
19
The Inspiration Deprivation
The thought of Amy winning a Nobel Prize overwhelms her, leading to an emotional breakdown as she contemplates the impact it would have on women aroun...
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20
The Decision Reverberation
Raj feels anxious that his recent paper, which proposes he might have found evidence of alien life, will undermine his credibility in his profession. ...
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21
The Plagiarism Schism
Kripke has uncovered evidence that Dr. Pemberton copied his college thesis, leaving Sheldon and Amy torn about whether to report him. At the same time...
-
22
The Maternal Conclusion
Leonard is caught off guard when his mother, Beverly, pays him a visit and treats him with unexpected warmth. However, his surprise quickly fades when...
-
23
The Change Constant / The Stockholm Syndrome
Sheldon and Amy are on edge, anticipating significant news. At the same time, Penny and Leonard have their own exciting announcement to share. Howard ...
-
24
Unraveling the Mystery: A Big Bang Farewell
Johnny Galecki and Kaley Cuoco will take fans on a nostalgic journey, revealing some of the most cherished behind-the-scenes stories and personal anec...
