Plot: Guests: --The ""New"" Supremes - ""Up the Ladder to the Roof"" & show tunes (Supremes with Cindy Birdsong, Jean Terrel & Mary Wilson - without Diana Ross) --Joe Frazier (wearing tuxedo, in a boxing ring set) - sings ""Knock on Wood"" --Robert Klein (stand-up comedian) --Arte Johnson (stand-up comedian) --Caterina Valente - ""Never Will I Marry"" & ""Anything Goes"" --Michael Parks - ""Mountain High"" & ""My Melancholy Baby"" --Hawthorn Tigers (animal act) --Ed Sullivan Singers - ""Mame"" --Santini Demon (a. k