Sarah Michelle Gellar, Tony Kanaan, Sparta Sarah Michelle Gellar plugs The Grudge; 2004 Indy Racing League Champion Tony Kanaan visits; Sparta performs. Details Casts Title Sarah Michelle Gellar, Tony Kanaan, Sparta Genres Talk Comedy Release Date 2004-10-20 Episode Runtime 01 Hours 03 Minutes Season Number 12 Episode Number 38 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)