Darrin has go back to Merry Olde England and rescue Samantha during King Henry VIII's period. He goes along with Endora.
In Scotland, Sam and Darrin see the Loch Ness Monster, who ends up being revealed to be a warlock Serena that transformed into a monster a few decades ago. Serena decides to set him free, but Bruce gets his revenge when he gives Serena a mermaid tail.
Darrin and Samantha go sightseeing in Rome and Endora attempts to test Darrin's loyalty to her daughter by bringing the famous Venus statue to life.
Samantha and Darrin are now in Paris and Endora is back home looking after Tabitha and Adam. Maurice pays a visit and learns that the Stephens are vacationing in Europe. He is furious because they should have stopped by in London to see him. Endora flies to Paris to warn Samantha and Maurice then shows up in a scary cloud of smoke. Endora creates a fake Darrin who manages to charm and please Maurice. After Maurice discovers the truth he sends the real Darrin to the top of the Eiffel Tower.
Endora decides to sick cat witch Ophelia to flirt around with Darrin to prove that he can have eye on another woman, but Samantha knows her mother is up to the scheme on breaking there marriage.
Adam Stephen has been chosen to be tested by Grimalda and Enchantra the witch council to see if his magic powers are limited. But thanks to Maurice for making him fly they demand to take Adam for 40 years in training warlock school. But Sam won't allow it.
Endora decides to test Darrin's honesty and gives him a pin with a spell that makes him tell the truth. Darrin discovers that honesty is not always the best policy after he jeopardizes an important account. Samantha and Darrin tell each other how much they love each other, without the magic of the truth pin as the series comes to a close.