Bewitched - Season 7 - Eps 27: Laugh, Clown, Laugh
Endora claims that Darrin has no sense of humor, so she puts a spell on him, turning him into a comedian. His client, Mr. Jameson, does not like Darrin's new Def Comedy Jam phase when he gets a migrane headache. Darrin discovers that Endora has hexed him, and she gives him another spell- this time, making jokes of anything sad or discouraging. The Jamesons come by and at th very mention of Jamison's wife's bursitis, Darrin starts laughing. Thinking that Darrin's insensitivity will cost Larry and him the account, the Jamesons think otherwise and give McMann and Tate the account.
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