Bewitched - Season 3 - Eps 20: The Corn is as High as a Guernsey's Eye
Aunt Clara thinks that she is worthless and barren and wants to turn herself into something useful. Samantha discourages her from abusing herself and invites her to go to lunch with Darrin. At Darrin's building, Samantha leaves for a moment and Aunt Clara finds a seat in a covered-up display and falls asleep. Meanwhile, a policeman and a animal handler are fighting about having a cow in the building. This cow is actually the Morton Milk cow and it runs off. Samantha comes back to see this cow and thinks that Aunt Clara made good on her threat. She twitches the cow home to try to turn her back into her beloved aunt. Back at the building, the cow ends up missing and Darrin finds Aunt Clara. Samantha notices her mistake and returns the cow to its rightful owner.
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