Big Bang Theory

The Big Bang Theory
8/7c CBS
Any one of Penny's dates — Leonard expected — would be the last person with whom the guys would have anything in common, let alone befriend. However, they do find a perfect reason when they ask her latest buff boyfriend to help them by joining them in a costume contest in which they're entering as members of the Justice League. — Bill Ecklund

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Gift of the Magi
8/7c Hallmark
Marla Sokoloff and Mark Webber star in this modern, made-for-cable update of the classic short story by O. Henry. Sokoloff and Webber play Della and Jim Young, newlyweds with little money but who still want to buy each other nice gifts for Christmas. The secrets involved in obtaining these gifts put a strain on their marriage, however, and their friends end up working together to reunite the pair before it's too late. — Brie Hearn

Thursday Night Football
8/7c NFL Network
The Chargers host the 49ers with playoff hopes on the line for both teams. While neither of these squads has performed up to expectations this season, both are in the running for division titles. The Niners, even at 5-8, are only a game out in the "doesn't anybody want this?" NFC West; while the 7-6 Chargers stayed in the AFC West hunt with a big win last weekend over the division-leading Chiefs. The best postseason shot for each team is a division win, although San Diego still has an outside chance for a wild card berth. — Dave Roeder

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Burn Notice
9/8c USA
Burn Notice wraps up its fourth season with back-to-back episodes. In the first, Brennen once again tangles with Michael, this time threatening to release valuable information if Michael doesn't kill government agents for him. The repercussions of Michael's actions hit home in the season finale, immediately following, in which a tactical assault team descends on Miami, posing a risk to everyone Michael loves. — Brie Hearn

Larry King Live
9/8c CNN
When radio talker Larry King first took over the 9 pm slot on CNN from Sandi Freeman in 1985, who would have guessed that he'd rule the time slot (within the cable-news universe) for most of the next 25 years? He's been kissed by Marlon Brando, quizzed presidents and joked with comedians (and sometimes vice versa), and rarely failed to ask the questions viewers would ask if given the chance. And though King is slated to return for a few specials a year, his weeknight Larry King Live, which airs its final new show tonight, will be missed. — Jeff Gemmill

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It's Always Sunny in Philadelphia
10/9c FX
If you have ever wanted to see Danny DeVito's backside, you have your chance tonight. Consider it the gang's Christmas present to you. It's one of the highlights, as it were, of the hour-long Season 6 finale (which has been available on DVD, but let's not quibble about that). Other highlights? There are flashbacks to Christmases past that include a sleigh full of stolen toys. Santa takes a beating. And, in a story line that turns "A Christmas Carol" on its ear, Dennis and Dee try to teach Frank the true meaning of Christmas. Their version of it, anyway. — Paul Droesch

Funniest Commercials of the Year: 2010
10/9c TBS
It's beginning to look a lot like...commercialism. It's the holiday season and sponsors are running amok, yet this seventh annual year-end special embraces this onslaught with laughs. Smooth ad sensation Isaiah Mustafa, famed in the commercial realm as "the man your man could smell like," hosts a compilation of 2010's wittiest and most entertaining commercials from the United States and abroad. The retrospective of mad, rad ads features appearances by David Hasselhoff and Jonathan Goldsmith, known in advertising as the "most interesting man in the world." — Dean Maurer