All in the Family - Season 9 - Eps 19: The Return of Archie's Brother
When Archie's brother, Fred, visits Archie to open up a business, he also brings his 18 year old wife, Katherine. Both, Archie and Edith, and even Stephanie, are shocked as they find out. While the new bride and Edith cook supper, Archie and Fred argue about Katherine's age. Before dinner, Fred (and Katherine) leave the Bunker's home, canceling the business. In bed, Edith asks Archie if he were a single 55 year old man, would he go for a young girl. Archie answers no.
About All in the Family

Title: All in the Family
First Air Date: 1971-01-12
Last Air Date: 1979-04-08
Status: Ended
Rating: 7.868/10 (from 163 votes)
Language: EN
Seasons: 10
Total Episodes: 210
Network: CBS
Genres: Comedy
Production Companies: Viacom Enterprises, Tandem Productions, ABC
Synopsis
Archie Bunker, a working class bigot, constantly squabbles with his family over the important issues of the day.
Cast

Carroll O'Connor
Archie Bunker

Jean Stapleton
Edith Bunker

Danielle Brisebois
Stephanie Mills