Sigourney Weaver, Marv Albert, Julian Casablancas Dave & Sigourney Weaver turn "Avatar" blue. Plus: Marv Albert's wild & wacky sports bloopers and Julian Casablancas performs. Details Casts Title Sigourney Weaver, Marv Albert, Julian Casablancas Genres Talk Comedy Release Date 2010-01-06 Episode Runtime 01 Hours 03 Minutes Season Number 17 Episode Number 68 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)