Bewitched - Season 3 Episode 20 : The Corn is as High as a Guernsey's Eye 1972

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.