Grady was of the first TV shows that portrayed a middle class Black family sans stereotypes. The Marshall family didn't have any conflicts with appearing bourgeois and trying to fit in to a so-called white suburban culture nor did they shy away from their Blackness. In fact the actress Rosanna Katon as the daughter Kellie, played her role so well that her character came across as the "Black girl growing up in the suburbs persona".
Kind of like the Jennifer Freeman character in the current ABC sitcom, "My Wife and Kids", but more practical.
I remember Carol Cole to be absolutely gorgeous. I wonder what has happened to her these days. Rosanna Katon became Playboy Playmate of the month in September 1978.