Episode 13 of "Sabrina, the teenage witch"
s01e13 Jenny's Non-Dream
Title: Jenny's Non-Dream
Original Air Date: 01/10/1997 on ABC
Plot Outline:
When Sabrina is apprehensive about inviting Jenny to spend the night because of her "unique" home life, Hilda and Zelda assure her that she has nothing to worry about. But when Jenny accidentally enters the other realm through the linen closet, Drell cites the rule against mortals entering his world and turns her into a grasshopper, so Sabrina and her aunts must find a way to convince her that the whole experience was just a dream. (They get help from the official Rules Keeper, who cites the rule that "Every rule must have a loophole.")