Paul Shaffer at the 'You Had to be There: How the Toronto Godspell Ignited the Comedy Revolution ...' premiere at TIFF on Sept. 6. Cindy Ord/Getty Images Share on Facebook Share on X Share to Flipboard Send an Email Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Print the Article Post a Comment A feature documentary about Paul Shaffer, best known David Letterman's longtime sidekick and Late Show bandleader, is in the works.