I think the character on which the episode is the focus the least is Cliff. Which is kind of unique becasue the show is called "The Cosby Show" and the focus is almost never on the character played by Bill Cosby. Most of the episodes focus are on the kids however I think there alot more episodes focus on Clair then Cliff. Got to give Bill Cosby probs for making the supporting cast such an important part of the show. More of the shows today should be like that.

Sure, there really isn't a focus on him, but Cliff is a pretty large part of almost every (if not every) episode, and always had a lot of lines...

I know Cliff is a huge part of the show. I am just compelmenting Cosby for being willing to share the spotlight with others.