Bewitched - Season 2 - Eps 27: The Leprechaun
A leprechaun from Darrin's family (surprise, surprise!) named Brian O'Brian comes to reclaim his rightful pot of gold from one of Darrin's clients Mr. John Dennis Robinson.Brian states that without his gold, he has no powers and gets into a lot of trouble trying to get his gold back. By the end of the episode, he makes a deal with Mr. Robinson: his pot of gold back for his image on the advertising campaign and a deal with McMann and Tate.
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