David White

Nelson Brenner, an advertising consultant who leads a double life as a top domestic spy, sends his former partner on an assignment to recover microfilm from a foreign agent. In reality, Brenner actually sets up his ex-partner, code name Geronimo, for a homicide that Brenner masks as a mugging. When Columbo investigates the crime, his clues lead him through a series of mysterious identities and a maze of domestic intrigue.

Samantha gives a dinner party to impress Rex Barker, one of Darrin's clients. Rex brings along his date, Babs Livingston, but advances on Samantha in the garden when he gets drunk. Barker becomes too aggressive and Samantha changes him into a dog. Darrin, thinking only of the possible loss of the account, is furious and Samantha locks him and the dog out. Endora sets a cat on the dog, who comes out much the worse for wear. Samantha takes Barker to a vet and then changes him back to a man. The next morning, Barker, not having learned a thing from the night before, again makes a pass at Samantha. This time Darrin floors him with a punch and walks out on his job. Later, Barker apologizes and signs the contract on condition that Darrin return to the agency.

Darrin struggles for days to create an advertising campaign for Caldwell Soup. Samantha's suggestions seem perfect, but Darrin's pride leads him to suspect Witchcraft. Stubborn, Darrin presents his own ideas to Phillip Caldwell, who rejects them. Samantha, worn out with housework, is stung when Darrin accuses her of using witchcraft to do that too. Endora, Samantha's mother, who dislikes Darrin, is pleased when the couple quarrels, and Samantha, packing in her own curious fashion, walks out. Crushed at losing his wife and a client in one week, Darrin submits Samantha's ideas to Larry Tate, his boss, who thinks they are great. Tate is bewildered when Darrin ecstatically accepts Caldwell's rejection and dashes home to make up with Samantha. Darrin then uses Samantha's chance remark as the basin for a successful Caldwell Soup campaign, blissfully unaware that Samantha planned it just that way.

Samantha, her friends, Bertha and Mary, and her Aunt Clara, all witches, decide to change the popular conception of witches into a more flattering image. Their opportunity arises when Darrin, an ad man, is assigned to devise a trademark for a new type of Halloween candy. Mr. Brinkman, the promoter of the candy, wants the trademark to show a traditional witch. Darrin at first agrees, but when he sees how upset Samantha becomes, he decides to present a beautiful witch. Mr. Brinkman objects, but Darrin refuses to yield. Consequently, he is fired. The witches decide to practice some of their pranks on Mr. Brinkman. As a topper, they transform him into an ugly old witch. Mr. Brinkman finally admits that his idea of witches is wrong. He agrees to use a glamorous witch for his trademark. Samantha wins her point, and Darrin wins back his job.

Darrin's workload piles sky-high when Larry Tate and his wife Louise fly to Paris to cover the fashion showings- for a client. Samantha spends most of the time alone playing solitaire. She accepts Endora's invitation to fly to Paris, without a plane, of course, for lunch. In Paris, Samantha and Endora run into the Tates. Larry is surprised, phones Darrin that Samantha and her mother are in Paris with them. Samantha returns home immediately. Darrin tells Samantha their marriage is a mistake, since he has taken her away from all the high living she seems to love. Although Samantha tries to convinces Darrin that he is wrong, she angrily leaves, and returns to Paris. Larry Tate tells Darrin Samantha is lonesome for him. Darrin decides to follow her to Paris. After several unsuccessful tries, Samantha gets on Darrin's plane, and they arrive in Paris together.