From Season 1 Episode 18.\rbr\rbrThe Late Great Phyllis Diller and Rowlf The Dog do some Classic Comedy on The Muppet Show.\rbr\rbrFrom Season 1 Episode 18.\rbr\rbrThe Muppet Show Season 01 Episode 20 Phyllis Diller.\rbr\rbrPhyllis Diller (July 17, 1917 -- August 20, 2012) joins the resident Muppet orchestra to perform the Scott Joplin classic The Entertainer.