S6, E18: Samantha returns from shopping to find that Endora has changed her living room furniture from Early "Stephens'" to Louis the Fourteenth. Samantha pops her own furniture back. Only after they have "popped" the furniture back and forth do they realize that Darrin's mother, Mrs. Stephens, is standing in a state of shock watching the spectacle. She is convinced that she is losing her mind. When Darrin arrives, Samantha tells him what happened and that the only thing to do is to tell his mother the truth -- that she is a witch. Darrin finally agrees and Samantha puts on a little show of witch power for Mrs. Stephens.