TONIGHT: It's truly the last day of the TV season as American Idol, Criminal Minds and CSI: NY wrap up. Plus, new episodes of Top Chef Masters and Peep Show.

8:00 PM

American Idol The winner will be announced and an hour later will be dropped by their label. (FOX)

9:00 PM

Criminal Minds In the season finale, the team heads to LA to hunt for a serial killer. (CBS)

10:00 PM

Top Chef Masters The final five prepare meals inspired by Greek gods. Kelly Choi still way too thin. (BRAVO)
The Challenge: Fresh Meat II With Wes gone, there's now more steroids to go around. (MTV)
CSI: NY The sixth season ends with a serial killer out for revenge. In case you were wondering, every big CBS finale included a serial killer this year, including Two and a Half Men. (CBS)
Peep Show Mark gives a make or break presentation. (BBC)

Who's on the Late Night Couches Tonight?

The Daily Show: Jack Rakove (Comedy Central, repeat)
The Colbert Report: Gov. Gary Johnson (Comedy Central, repeat)
Jimmy Kimmel Live: Jonah Hill, Cat Deeley, Stone Temple Pilots (ABC)
Lopez Tonight: Nick Cannon, Toni Braxton (TBS)
Chelsea Lately Dan Levy, Josh Wolf, Jen Kirkman (E!)
The Tonight Show with Jay Leno: Kathy Griffin, Paula Deen, Hanson (NBC)
Late Night with Jimmy Fallon: Jake Gyllenhaal, Mario Cantone, The Black Keys (NBC)
Last Call with Carson Daly Nick Stoller, Kidz in the Hall, City and Colour (NBC)
Late Show with David Letterman: Don Rickles, Piedmont Bird Callers, John Prine with Yim Yames of My Morning Jacket (CBS)
Late Late Show with Craig Ferguson: Antonio Banderas, Paula Poundstone (CBS)