Dan Rather, Regis Philbin In the first show following the terrorist destruction of the World Trade Center, Dave welcomes CBS anchorman Dan Rather and Regis Philbin. Details Casts Title Dan Rather, Regis Philbin Genres Talk Comedy Release Date 2001-09-17 Episode Runtime 01 Hours 03 Minutes Season Number 9 Episode Number 16 Production Companies Worldwide Pants, CBS Entertainment Productions, CBS Productions, CBS Studios David Letterman Self - Host Paul Shaffer Self -Musical Director Alan Kalter Self - Announcer (voice)