Bewitched - Season 3 - Eps 18: Ho Ho, the Clown
Samantha and Endora take Tabitha to a taping of Ho Ho, the Clown, where Darrin's newest client, Solow Toys, is the sponsor. Because Tabitha is related to Darrin, she is prohibited from the contests. Endora does something about that and makes Ho Ho fall in love with Tabitha and gives her all the prizes. This jeopardizes both Darrin's job and causes the show to be cancelled if they don't do something soon. Samantha comes up with a terrific plan: Tabitha's appearance on the show was a publicity stint for a new Tabitha doll.
About Bewitched

Title: Bewitched
First Air Date: 1964-09-17
Last Air Date: 1972-03-25
Status: Ended
Rating: 7.861/10 (from 695 votes)
Language: EN
Seasons: 8
Total Episodes: 254
Network: ABC
Genres: Sci-Fi & Fantasy, Comedy, Family, Drama
Production Companies: Columbia Pictures Television, Screen Gems
Synopsis
Samantha Stephens is a seemingly normal suburban housewife who also happens to be a genuine witch, with all the requisite magical powers. Her husband Darrin insists that Samantha keep her witchcraft under wraps, but situations invariably require her to indulge her powers while keeping her bothersome mother Endora at bay.
Cast

Elizabeth Montgomery
Samantha Stephens

Dick Sargent
Darrin Stephens

Agnes Moorehead
Endora

David White
Larry Tate