• At 8, ABC has a new Ugly Betty, then a new, two-hour Grey's Anatomy.
• CBS has a new Survivor, followed by new episodes of CSI and Shark.
• NBC has new, "supersized" episodes of My Name Is Earl, The Office, Scrubs, and ER.
• There's a new Are You Smarter Than A Fifth Grader? on FOX at 8, then a new Trading Spouses.
• The CW has a new Smallville at 8, then a new Supernatural.
• PBS has a new Live From Lincoln Center at 8, with Audra MacDonald, Wynton Marsalis, Philip Glass, and Laurie Anderson.
• MSNBC has the first Republican candidates debate at 8.
• The History Channel has Spider-Man Tech at 8, a look at actions and science in the films and comics.
• Also at 8: Food Network has two new eps of Gotta Get It.
• At 9, HGTV has a new Divine Design.
• At 10, Spike has a new Ultimate Fighter.
• Also at 10: Showtime has a new Penn & Teller's Bullshit (repeated at 11).

Check your local TV listings for more.