The tribes merge on Survivor: The Australian Outback (8 p.m., CBS). Hopefully, nobody falls into a campfire this week. On The Gilmore Girls (8 p.m., WB), Rory and Dean hit the three-month mark, and Lorelai eyeballs Luke's old girlfriend. Tonight's "Revenge of the '80s" offering is a 227 marathon (8:30 p.m., Nickelodeon), nine episodes of the sitcom that gave the world Jackee. Will & Grace (9 p.m., NBC) reruns the one where Cher drops by to verbally slap Jack around. On CSI (9 p.m., CBS), Catherine searches for a girl who was kidnapped 16 years earlier. ER (10 p.m., NBC) unearths the much-honored "Love's Labor Lost" episode from several seasons ago. It's the one where Greene makes one mistake after another trying to deliver a baby, and it's harrowing beyond belief. If you're pregnant and you watch this, you'll be sorry. Mooney and Trout settle in to their FBI assignment on Big Apple (10 p.m., CBS). I don't know about you, but I'm still trying to figure out what the heck was going in last week's premiere. The show is so self-consciously complex and obtuse, it should come with explanatory pop-up video bubbles.
Spurs at Trail Blazers (8 p.m., TNT)
Atlantic 10 Tournament (noon, ESPN; 9 p.m., ESPN2)
Big East Tournament (noon, 7 p.m., ESPN2; 2 p.m., 9 p.m., ESPN)
Big Ten Tournament (2 p.m., ESPN2; 4 p.m., ESPN)
ACC Tournament (7 p.m., ESPN)
Mountain West Tournament (midnight, ESPN)
Rosie O'Donnell (syndicated) Mary Stuart Masterson, Natasha Richardson
David Letterman (CBS) Julia Roberts (rerun)
Jay Leno (NBC) Russell Crowe (rerun)
Politically Incorrect (ABC) Randy Newman, Robert Reich
Conan O'Brien (NBC) Heather Locklear, Maura Tierney (rerun)
Craig Kilborn (CBS) Dan Patrick, Garcelle Beauvais (rerun)
All times Eastern unless noted.