S21E07 Rednecks and Broomsticks
After getting lost in a game of hide-and-seek, Lisa wanders into the field and discovers three teenage girls, including Cassandra, who are practicing Wiccans. Though she is skeptical of their spells, the girls assure Lisa that they never hurt anyone and ask her to join their coven. Just before Lisa is inducted into their pact, Chief Wiggum arrives and arrests the three girls for witchcraft and Lisa becomes the star witness in the trial. Meanwhile, Homer starts hanging out with Cleatus and his hillbilly friends when he discovers that they make moonshine.