Talk Talk: Senator Hillary Clinton, John Krasinski, Patton Oswalt

Who's on the late night shows tonight.

• Charlie Rose: David Axelrod and a preview of the NCAA Final Four
• The Daily Show: George Clooney
• The Colbert Report: Clay Shirky
• The Late Show with David Letterman: Renee Zellweger, Gayle King, and Paddy Casey
• Jay Leno: Senator Hillary Clinton, Patton Oswalt, and Ferras
• Jimmy Kimmel Live: 1000th episode special
• Tavis Smiley: Dorothy Cotton and Clarence B. Jones
• Late Night with Conan O'Brien: John Krasinski, Bode Miller, and Cobra Starship
• The Late, Late Show with Craig Ferguson: Jennifer Love Hewitt, Jonny Lee Miller, and Mrs. Hughes
• Last Call with Carson Daly: Harland Williams and Sheryl Crow (repeat)