PREVIEW: Letterman's Late Show, Wednesday, February 22, 2012: Paul Rudd, John Witherspoon, Heartless Bastards

It should be an entertaining show tonight, as Dave welcomes back frequent guests Paul Rudd and John Witherspoon. Musical guests are the Heartless Bastards, who made their national television debut on The Late Show almost exactly three years ago. Here are some clips from each guests' previous appearances: Relevant trivia regarding Mr. Witherspoon: According to imdb.com, Letterman is the godfather for Witherspoon's two sons. That friendshop is obvious when watching the two together on the Late Show: