Late Show with David Letterman

A Yule Log is set up in front of Dave's desk, and later Dave and Renee Zellweger pose Christmas-photo style next to the green screen; Dave acknowledges Dave Dorsett's 41 years at CBS by giving him a tie; Shannon Eis' new holiday toys includes Butterscotch, an expensive animatronic pony that allegedly responds to touch but doesn't cooperate onstage; Taking Back Sunday performed "Liar (It Takes One To Know One)."