Return Of Archie's Brother

S9 E19: 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.