Autumn Croakus is an episode of the television series The Munsters. It was written by James Allardice and Tom Adair and directed by Lawrence Dobkin. It first aired November 26, 1964.
Description[]
Grandpa wants to marry again, because he's feeling lonely. He looks for a fiancée in a matrimonial agency. Herman is against it, but Grandpa gets fascinated with a woman named Lydia Gardner. What Grandpa doesn't know is that she is from a fraudulent agency. Lydia makes her living by marrying men and then killing them for their money.
Even though Herman refuses to meet Lydia, Lily and Grandpa invite her to stay at the house for a while. Lydia's first attempt to kill Grandpa fails. That evening she sees Herman for the first time, screams and runs out of the house. The police catch her outside and explain to Marilyn what she was up to.