Marilyn is depressed because all her boyfriends, including her latest named Jack (Edward Mallory), run away after their date. Grandpa wants to help her. He cooks up a love potion and slips it into Marilyn's oatmeal, but Marilyn skips breakfast and Herman, Lily, and Eddie accidentally eat the love potion. The postman starts to flirt with Lily. Yolanda Cribbins (Claire Carleton), a neighbor who does not like the Munsters, suddenly finds Herman very attractive. Eddie is chased by a bunch of girls, trying to catch him. Grandpa finds out what is happening when Marilyn tells him that she didn't eat the oatmeal that morning. The potion eventually wears off and the postman and Yolanda run off. Marilyn tells Grandpa that she would rather have someone like her for herself.
