Trick or Treat (S02E07)

Despite Endora's demand that Samantha accompany her to a witches celebration of Halloween, Darrin insists that his wife stay at home to entertain Louise and Larry Tate, Jack Rogers, a client, and his wife, Phyllis. Disguising herself as a child in a gypsy costume, Endora hexes Darrin with a spell that will gradually turn him into a werewolf. When Samantha demands that her mother remove the spell, Endora tells her she can't remember the words. (iTunes)