A Nice Little Dinner Party - S1.E19

Promising to behave when she meets Darrin's parents, Endora turns on the charm and is promptly accused by Darrin's mother Phyllis of trying to steal her husband Frank's affections. Frank takes Endora to a play when Phyllis refuses to go. Phyllis wants a divorce when Frank doesn't come home that night, but he actually locked himself out and stayed at the club. Endora and Samantha use a little witchcraft to get them together.