Watch Late Show with David Letterman online: Episode 76 Zach Braff, Arj Barker, The Airborne Toxic Event

Zach Braff; Arj Barker; and The Airborne Toxic Event. PLUS: Great Moments in Presidential Speeches; "Bride Wars"; Mystery Sound in Space; Alan Kalter's How It Works; and a Late Show Farewell to Great Moments in Presidential Speeches.

Ready to Watch Late Show with David Letterman, Season 16, Episode 76?

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