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

• Charlie Rose: George Clooney and Norah Jones
• The Late Show with David Letterman: Steve Martin and Raymond Crowe (repeat)
• Jay Leno: William Shatner, Tricia Helfer, and Ryan Bingham
• Jimmy Kimmel Live: Keanu Reeves and Leona Lewis
• Tavis Smiley: John Larroquette and Aaron David Miller
• Late Night with Conan O'Brien: Oliver Hudson and AA Bondy
• The Late, Late Show with Craig Ferguson: Christina Applegate, Brittany Snow, and Gene Pompa
• Last Call with Carson Daly: Gary Cannon, Kenny & Spenny, and The Tender Box

• At 7:30, Sci-Fi has a new episode of The Sarah Jane Adventures.
• At 8, CBS has a new Ghost Whisperer, then a new Price Is Right Million Dollar Spectacular and a new Numb3rs.
• NBC has a new Amnesia at 8, followed by the Miss USA Pageant.
• The CW has a new Smackdown! at 8.
• PBS has a new NOW at 8, then a new Washington Week.
• Nickelodeon has three new episodes of SpongeBob SquarePants tonight, at 8, 9, and 9:30.
• Also at 8: ESPN has the Masters golf tournament.
• At 9, ABC has a new Duel, then a new 20/20.
• FOX has a new Canterbury's Law at 9.
• There's a new Your Mama Don't Dance on Lifetime at 9.
• At 10, Sci-Fi has a new Battlestar Galactica.
• Comedy Central has a new Comedy Central Presents at 10.
• E! has a new episode of The Soup at 10.
• At 11, HBO has a new Real Time with Bill Maher, with guests Jason Alexander, Richard Clarke, Dana Priest, Rep. Joe Sestak, and Richard Dawkins.