William Tregoe

When strange things begin happening to Adam Newlarkin, a friend of Darrin's, Aunt Clara tells Samantha he has inherited the spell placed by a witch on his ancestor who was a judge in Salem two hundred years before. Aunt Clara adds that unless Adam follows the antidote for the spell strictly, he will be branded a thief. The Stephens learn that Adam has been hired by a local bank. Samantha and Darrin manage to get Adam to kiss a dog, the first step. With Aunt Clara's help, Darrin dunks Adam in a pool three times. They have trouble persuading him to ride through town shouting praise of witches, which is the final step.

Aunt Clara is depressed by her waning magic. Larry Tate tells Darrin to forget the Morton Milk account since the Whittle Agency plans to display Ginger, the Morton's famous Guernsey cow in the lobby of the office building. Samantha hopes to cheer up Aunt Clara at lunch with Darrin, while Louise Tate minds Tabitha. Samantha goes off on an errand, leaving Aunt Clara in the lobby. Henerson, a policeman, forbids Culpepper , the deliveryman, to bring Ginger into the building. While they go off to phone, Barney, the elevator boy, sees Aunt Clara talking to a potted plant and suggests talking to the cow.

Dismayed to find Samantha hard at work painting the house, Aunt Clara conjures up a top painter -- Leonardo Da Vinci. Samantha asks her to send him back but Aunt Clara can't remember the reverse spell. To make Leonardo less conspicuous, Aunt Clara zaps him into one of Darrin's suits. At his office, Darrin finds himself in Renaissance attire, with palette and paint bush. J. P. Pritchfield of Mint-Brite Toothpaste, thinks Darrin plans to use the Mona Lisa smile in his ad campaign. Darrin makes his way home and learns that Leonardo has left the house. Worried that he will be picked up, Samantha and Darrin begin a search. In a museum, Leonardo sees some modern sculpture. He thinks it is raw stone and begins to chip away with mallet and chisel. Samantha arrives in time to stop his arrest and returns the piece to its modern form. Leonardo is wrathful that his Mona Lisa will be used to sell toothpaste. Samantha tells him the only way to prevent it is to provide another idea for the advertising. Later, Darrin presents a palette of toothpaste in matching flavors, with Leonardo's picture on the package. Pritchfield is sold on this major breakthrough into the children's toothpaste market. Aunt Clara finds the reverse spell but insists that Leonardo must paint her portrait before she returns him to his place in history.

Lynda Carter stars as the heroic Amazon princess in this Movie-For-Television that launches the second season of the hit series The New Adventures of Wonder Woman. After examining the plane that crash lands on Paradise Island Wonder Woman (Carter) learns that her realm is once again threatened. She convinces her mother that she must return to the outside world not only to help protect the free world from its enemies but also in this age of radar sonar and laser scanning protect the secret of Paradise Island and its ancient culture.

Ed's contribution of a wall to be used in a painting contest doesn't sit well with Chico.