At TV Tome and in the episode description on the DVD, it lists that Bill Cosby is a guest star in "Where's Poppa?" Yet I've watched the episode on DVD and I can't find him there. He's not listed in the ending credits. So what's the deal with it? My sister says she remembers seeing him there.

The way I remember it as it originally aired was; that night they were doing this thing where a cast member from each of the sitcoms on the CBS Monday night line-up would appear in an episode of each of the shows. It might not have been exactly like that, but it was similiar. I remember the last show of the night was Becker, and I recall cast members from the other shows sitting in the waiting room of his office. I don't recall what Bill Cosby's role in KOQ was exactly, but I'm pretty sure he was there when it first aired. They must have edited it out of the syndicated episodes and the DVD, because it probably wouldn't make too much sense unless you were watching the 4 episodes the night they originally aired.