Upon the suggestion of Endora, the owner of Bobbins Bonbons make her Mother-In-Law of the Year. When she doesn't show up Samantha turns herself into her mother.
Samantha wakes up in Larry Tate's bed as Lousie Tate. When returning to her home, she finds Louise thinking she is Samantha and Darrin is not noticing any difference.
When Endora accuses Darrin of being cheap, Darrin finds a bag full of $100,000 which he thinks Endroa zapped up. It is really stolen money that some crooks want back.
While vacationing in England Samantha frees a trapped nobleman from a painting. The witch who trapped him punishes Sam by sending her back to the time of Henry the VIII. While Henry wants to make Sam his next queen, Darren must travel to the sixteenth century and rescue her.
In Paris, Endora zaps up a fake Darrin to appease an irate Maurice who is angry as they did not visit him while in London. The real Darrin shows up and Maurice zaps him onto the top of the Eiffel Tower.
When visiting a castle in England, Darrin is possessed by a ghost who wants to get closer to Samantha. After he is rejected as Darrin, he makes a pass at Louise Tate.