Buffy and Jody want to start calling Uncle Bill, Dad, but Bill wants them to understand that they had only one father, so he takes them on a trip to Indiana to learn about the people who knew their father, and hopefully get Jody to understand who his father was. I don't know why, but this episode touched my heart so much. I even shed a tear watching it. IMO, Family Affair was among the best 5 sitcoms of the 60s.