Aunt Clara visits and believes her powers have finally blown a fuse, but in truth, Tabitha is the culprit. So without a reliable babysitter, Samantha and Darrin decide instead to hold a small anniversary cocktail party for themselves and the Tates. Samantha's new worry is hiding any of Tabitha's magic from the Tates while they're at the house.

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.