TONIGHT: A big block of reality programming at 8 gives way to stellar dramas at 9 as we get ever closer to the finale of Lost. Chase with your choice of Justified, the Hills, Parenthood or option D at 10.

8:00 PM

American Idol The final four compete by singing songs from movies. Jamie Foxx mentors and teaches the kids how to kill your career one terrible Michael Mann movie at a time. (FOX)
Biggest Loser Couples The contestants discuss ways to keep the weight off after the show and Tony Romo stops by to suggest choking as a good method. (NBC)
Dancing with the Stars Results are in and the Gypsy Kings performs. (ABC)
90210 Lots of things are happening to people named Navid, Silver, Dixon and Jasper. (CW)
NCIS The murder of a marine leads to a hunt for a serial killer. (CBS)

9:00 PM

Lost Flocke's motives become clearer as we get closer and closer to the series finale. (ABC)
Glee Puck makes a calculated move for the sake of his popularity and Rachel has a sore throat. (FOX)
The Deadliest Catch The fifth week of the king crab season finds the Northwestern sailing into arctic seas while a storm impedes the Time Bandit's final offload. (DSC)
NCIS: LA The team hunts a terrorist who escaped Army custody in LA. (CBS)

10:00 PM

Ashes to Ashes It's the Season 2 premiere of the show that is the sequel to the British show Life on Mars which you might remember for its American remake last year. (BBC)
Justified Just because Raylan is on leave from the Marshal's office doesn't mean he can't hunt down the guys who want to harm his ex-wife's new husband. (FX)
Parenthood Zeek spends time with Adam and Krstina and Crsoby considers settling down. (NBC)
V Erica locates a scientist who may have found a way to kill the Visitors. (ABC)
The Hills Heidi hosts a party which is nearly ruined by a crazy outburst from Spencer, but luckily she has time to get a few more procedures done and all is well. (MTV)

Who's on the Late Night Couches Tonight?

The Daily Show: Sebastian Junger (Comedy Central)
The Colbert Report: Hampton Sides (Comedy Central)
Jimmy Kimmel Live: Julia Louis-Dreyfus, the latest "Dancing With The Stars" castoff, Michael Bolton (ABC)
Lopez Tonight: Jennifer Lopez, Ken Jeong, Ozomatli (TBS, repeat)
Chelsea Lately Laura Bell Bundy, John Caparulo, Heather McDonald, Josh Wolf (E!)
The Tonight Show with Jay Leno: Amanda Seyfried, Guy Fieri, Luke Bryan (NBC)
Late Night with Jimmy Fallon: Evangeline Lilly, Kenan Thompson, Keith Urban, Mike McCready (NBC)
Last Call with Carson Daly Jared Harris (NBC)
Late Show with David Letterman: Queen Latifah, Will Forte, MGMT (CBS)
Late Late Show with Craig Ferguson: Melina Kanakaredes, Tom Lennon, Jonsi (CBS)