Simpsons Season 9, Episode 13: The Joy of Sect

After encountering two recruiters of a sect called "The Movementarians", Homer attends a session that teaches about their sect, where he is brainwashed to join. Homer moves the entire family to their compound, where the entire family, except Marge, is brainwashed. Marge escapes through a dangerous getaway, and finds Reverend Lovejoy, Ned Flanders and Groundskeeper Willie for help.