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 comedic routine when he gets a migraine headache. Darrin discovers that Endora has hexed him, and she gives him another spell that makes jokes of anything sad or discouraging. The Jamesons come by and at the very mention of Jameson's wife's bursitis, Darrin starts laughing. Larry thinks that Darrin's insensitivity will cost McMann and Tate the account. Samantha convinces them that everyone needs a good laugh sometimes. The Jamesons are convinced and give McMann and Tate the account.