NFL (6 p.m., NFL Network): Bears at 49ers

High school football playoffs (6:30 p.m., Ch. 14): 4A semifinal — Mountain Crest vs. Timpview

Survivor: Samoa (7 p.m., Ch. 2): Russell, who may be the most obnoxious castaway ever — which is saying something — is in danger of elimination tonight. And CBS is promising that all his maneuvering will lead to "one of the most memorable tribal councils in 'Survivor' history."

FlashForward (7 p.m., Ch. 4): Mark is hot on the trail of the tattooed assassin he saw in his flashforward.

Community (7 p.m., Ch. 5): When Annie's partner drops out, Jeff joins the debate team.

How the Beatles Rocked the Kremlin (7 p.m., Ch. 7): This hour looks at the impact the Beatles had on Soviet youth, even though they never performed in the USSR.

Bones (7 p.m., Ch. 13): Brennan and Booth investigate the death of a little person who was a wrestling star.

The Vampire Diaries (7 p.m., Ch. 30): Damon tells Stefan why he returned to Mystic Falls.

Women's college volleyball (7:30 p.m., The mtn.): Colorado State at Utah

CSI (8 p.m., Ch. 2): The three-part story that began on "CSI: Miami" and continued on "CSI: NY" concludes. (See related content at right.)

Grey's Anatomy (8 p.m., Ch. 4): Izzie (Katherine Heigl) returns; Owen recruits a fellow Iraq war veteran (Kim Raver of "24" and "Lipstick Jungle") as the hospital's new hotshot heart surgeon.

The Office (8 p.m., Ch. 5): Michael is thrown for a loop by troubling rumors about Dunder Mifflin.

Fringe (8 p.m., Ch. 13): An unknown force has mind-blowing consequences.

Supernatural (8 p.m., Ch. 30): In an episode titled "The Real Ghostbusters," Dean and Sam are tricked into attending a "Supernatural'' fan convention.

Project Runway (8 and 9:30 p.m., Lifetime): In Part 1 of the two-part season finale, the remaining contestants ramp up the competition.

30 Rock (8:30 p.m., Ch. 5): "TGS" is about to get a new cast member; Jack offers Liz a talk show.

The Mentalist (9 p.m., Ch. 2): Patrick has to work with Bosco to locate a kidnapped woman.

Private Practice (9:01 p.m., Ch. 4): Addison and Sam's hike turns into a rescue mission.

It's Always Sunny in Philadelphia (11 p.m., FX): Mac and Dennis decide they need to spend some time apart.