Perfect Storms (2013)

S1E21 F.U.N.

SpongeBob believes that Plankton's wickedness stems from his loneliness and lack of companionship. In an effort to help, SpongeBob decides to befriend Plankton and engage in fun activities with him. However, Mr. Krabs remains steadfast in his belief that Plankton is up to no good and warns SpongeBob against spending time with him.