Johnny Test (2005)

S4E4 Johnny BC

Determined to fetch a sloth bone for the twins, Johnny travels back to prehistoric times. However, upon his return, he finds himself transformed into a caveman, complicating his punishment for selling Hugh’s belongings. As he grapples with his new identity, Johnny's attempts to fit in lead to a series of chaotic encounters that threaten to upend both his grounding and his friendships.