Maurice, Samantha's father learns she's married, and wants to meet his new son-in-law, but disapproves of mixed marriages, and an argument prompts him to disintegrate Darrin. Endora is furious, and Samantha tells Maurice she loves Darrin and not to take him away from her.

The Stephens look after the Tate's baby while they are in London. When they return from the Tate's house with Jonathan, their baby, nosy old Gladys Kravitz finds Maurice and tells him that the baby has been born. Maurice then takes Jonathan, who he believes is his grandson, to a Warlock Club in London to teach him about witchcraft. After series of misunderstandings, Samantha clears everything up when she tells Maurice and Gladys that her baby is not due for a few months.

The Witches Council orders a coven. Tabitha is being tested for her powers by Hagatha and Enchantra, Endora's sisters who certifies true witches and warlocks. Tabitha passes with flying colors, proving to be an exceptionally talented witch. Hagatha, Enchantra and Endora insist that Samantha enroll Tabitha in a witches' school. After being booby trapped by phone cords and flat tires, Darrin comes home exactly when the decision is made. Darrin, Samantha and Aunt Clara stand against Hagatha, Enchantra and Endora, but Maurice chills the three witches--zapping them to the top of Mount Everest.

Maurice gives Darrin a magic lighter, which Darrin doesn't accept. Maurice turns Darrin into a donkey because of his ingratitude. Samantha tries to find her father and finds him in Paris. She returns to see that Darrin the donkey has been taken to an animal shelter. Darrin is released and Maurice back tracks everything that he did to turn Darrin back to a human.

Samantha and Darrin are now in lovely Paree and Endora is home with Tabitha and Adam. Maurice comes by the house and finds out that the Stephens are vacationing in Europe. He is mad because they should have stopped by in London to see how he was doing. Endora flies to Paris to warn Samantha and then Maurice appears in a scary cloud of smoke. Out of rare kindness, Endora zaps up a fake Darrin who charms and pleases Maurice. Everything just seems all right until the real Darrin comes in. Maurice notices the trick and sends poor Darrin to the top of the Eiffel Tower. Unbeknownst to him, his very appearance there makes a perfect advertising campaign for one of his clients who runs a travel agency.

Samantha has lost her powers again and it seems like Maurice's magic is gone as well when he visits her. Dr. Bombay discovers that no one should kiss Samantha or they would lose their powers. So, until his powers come back, Maurice lives like a mortal. Maurice then helps out Darrin by winning a chili account for him. And that's when Samantha and Maurice get their powers back respectively.

The Witches Council wants to test out Adam to see if he is a warlock or a mortal. If he is a mortal, he wilh have to be taken away from the Stephens' household. Maurice helps Adam by giving him powers so that he will not be taken away. Adam is indeed normal, but he does have his own powers tucked away somewhere.