The character of Carl Dixon was written out of the show at the request of Esther Rolle. He is briefly referenced in this episode but never mentioned again afterward. When Florida first returns from Arizona, Willona asks her about Carl and she shakes her head implying that he had passed away. Florida then gives Michael a book that she says is from Carl.
Thelma mentions that Keith will be making as much money as the President Of The United States. In 1978, Jimmy Carter's salary was around $200K/year.