Jon Stewart had comedian Denis Leary return to the program last night. The comic-turned-actor is out promoting his new Christmas book that the network forced on him. Naturally, Stewart had a ton of fun at this and the lack of content in the literary work, but Leary justified it all by saying that the proceeds will go to benefit firefighters–something he cares passionately about as indicated by his six-season-long stint on the FX series Rescue Me.
