When an ankle injury confines Darrin to bed, Samantha enchants the house so it can fulfil Darrin's needs. Darrin becomes intoxicated with the idea of magic, and starts encouraging Samantha to use her powers, but the change is not all for the better. Darrin quits his job and wants to travel the world. But soon he comes to realise he likes his old life better.

To assist her daughter in a dress fitting, Endora transforms herself into a double of Samantha. While at the fitting, Robert Frazer, a young writer, becomes smitten with her. Endora decides to cavort with him as Samantha. Meanwhile, Gladys Kravitz thinks Samantha is having a secret affair. There are further complications when it turns out that Bob is an old friend of Darrin's. Endora shows up as Samantha at a dinner that Darrin, Sam and Bob are having. Bob now believes Endora is Sam's twin.

Darrin's old college rival, Charlie Harper, has a very successful life and wife Daphne loves to brag about it--their castle has a moat! During a weekend visit to the Harper's latest home, Samantha unintentionally upstages Daphne, creating tension between the two. Finally, Samantha plays Daphne's game, and zaps a loaded jewelry case and a mink coat (made of identical twin mink pelts.) Darrin's ego is hurt. How can he compete with Samantha's witchcraft? To make amends, Samantha gives the coat to Daphne after she insists that the Stephens sell it to her. Samantha reassures Darrin she could zap up mink coats all day long, but she could never zap up another Darrin Stephens.