While Samantha and Darrin go out for the evening with the Tates, they get Aunt Clara to babysit Tabitha. When Larry and Louise ask at the last minute if Aunt Clara can also babysit their son Jonathan, Samantha feels she has no other choice but to say yes. Aunt Clara decides to use witchcraft to amuse the children, but instead of conjuring up a toy pony as was her intention, she instead conjures up a second Jonathan, identical to the first. 

Endora and Uncle Arthur have a falling out over who is to live in a house across the street. Gladys wants to find out about the disappearing and reappearing house, much to Sam and Darrin's dismay!