Here's who's on the late night shows tonight.

• Charlie Rose: a discussion of Big Brown's Triple Crown chances
• The Late Show with David Letterman: Jenna Fischer, Jim Nantz, and Gavin Rossdale
• Jay Leno: Will Smith, Pete Sampras, and Ed Harcourt
• Jimmy Kimmel Live: Kevin Nealon, DeAnna Pappas, and The Ting Tings
• Tavis Smiley: Sarah Sentilles and Jewel
• Late Night with Conan O'Brien: Kim Cattrall, Matt Taibbi, and Lightspeed Champion
• The Late, Late Show with Craig Ferguson: Michael Clarke Duncan, Chelsea Handler, and Griffin House
• Last Call with Carson Daly: James Denton and The Heavy (repeat)

• At 8, The CW has a new Smackdown!
• PBS has a new Washington Week at 8, followed by new episodes of NOW and Bill Moyers Journal.
• At 8:30, Food Network has a new Rachael Ray's Tasty Travels.
• HBO has a First Look at the new Incredible Hulk movie.
• At 9, NBC has a new, two hour Dateline.
• Sci-Fi has a new Doctor Who at 9, then a new Battlestar Galactica.
• There's a new Man vs. Wild on Discovery at 9.
• At 10, ABC has a new 20/20.
• History Channel has a new Shockwave at 10.
• E! has a new episode of The Soup at 10.
• Also at 10: Comedy Central has a new Live at Gotham.

Check your local TV listings for more.