Mork & Mindy (1978)

S4E9 Alienation

Title: Isolation Plot: Mork and Mindy reveal to Mearth that he is not from Earth, which deeply distresses him, prompting him to flee. In his escape, he is taken by a group of Utopians. To save him, Mork and Mindy disguise themselves as members of this cult, navigating their way through their bizarre beliefs to rescue Mearth and bring him back home.