PRIME TIME

With the success of Sanford and Son, Good Times, That's My Mama, and The Jeffersons, it would seem that the Modern Black Sitcom (as opposed to Amos 'n Andy 'n' Beulah) is a concept whose time has arrived. Not so. It's more devious than that. The important thing to remember is that when dealing with TV not only are things often not what they seem, they are often less than they seem.