• Charlie Rose: Terry McCarthy from ABC News
• The Daily Show: John Bolton
• The Colbert Report: Willie Nelson
• The Late Show With David Letterman: Adam Sandler, Lucinda Williams, and Danica Patrick
• Jay Leno: David Spade, Richard Engel, and Hinder
• Jimmy Kimmel Live: Mark Wahlberg, Wes Craven, and Mims
• Tavis Smiley: Terrence Howard and Steve Bickerstaff
• Late Night With Conan O'Brien: Bernie Mac, Chris Daughtry, and Chris Hansen
• The Late, Late Show With Craig Ferguson: Cuba Gooding Jr., Joely Richardson, and Andy Vastola
• Last Call With Carson Daly: Eddie Izzard and Vietnam

Update: Letterman actually went home early because he was sick, so Adam Sandler is taking over as guest host.

• At 8, FOX has a new, two hour American Idol.
• NBC has a new Dateline at 8.
• CBS has a new NCIS at 8, then a new episode of The Unit.
• At 9, ABC has a new Primetime, followed by a new Boston Legal.
• There's a new Pussycat Dolls Present at 9 on The CW.
• Food Network profiles Sandra Lee on a new Chefography at 9.
• At 9:30, TCM has the original The Thin Man from 1934.
• At 10, PBS has a new episode of Independent Lens.
• TLC has a new Miami Ink at 10.
• Sci-Fi has a new ECW at 10.
• Also at 10: FX has a new episode of Dirt.

Check your local TV listings for more.