Louis C.K., a performance from the Broadway cast of Rocky Details Casts Title Louis C.K., a performance from the Broadway cast of Rocky Genres Talk Comedy Release Date 2014-05-01 Episode Runtime 01 Hours 03 Minutes Season Number 21 Episode Number 63 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)