DON'T MISS: "The Walking Dead" -- Season 3 of prime time's zombie sensation has been both extremely sad (R.I.P., Lori) and gruesome. This week brings the show's midseason finale and the promise of a major clash between the savvy survivors, led by noble Sheriff Rick (Andrew Lincoln), and the residents of Woodbury, lorded over by the deranged Governor (David Morrissey). Will estranged brothers Merle and Daryl collide? Where will Andrea's loyalties lie? How many rivals will Michonne take out? We don't know, but we're pretty sure it will be bloody. 9 p.m. Sunday, AMC.
SUNDAY: Have the tissues handy for "The Christmas Heart." It's a TV movie about a community that rallies around a teen who needs a heart transplant. Teri Polo and Paul Essiembre star. 8 p.m., Hallmark.
SUNDAY: In the season finale of "Boardwalk Empire," a desperate Nucky (Steve Buscemi) cedes control of a prized asset to Rothstein (Michael Stuhlbarg) in an attempt to weaken Gyp and Masseria's (Bobby Cannavale and Ivo Nandi) alliance. 9 p.m., HBO.
MONDAY: "Blake Shelton's Not So Family Christmas" is a holiday special that has the country crooner getting all festive with his guests Christina Aguilera, Kelly Clarkson, Jay Leno, Reba McEntire and his wife, Miranda Lambert. 10:01 p.m., NBC.
TUESDAY: "Sons of Anarchy" -- or the show we like to call "Hamlet on a Harley" -- concludes its bloody, brutal and totally
TUESDAY: What does it take to move an entire pro football team from game to game, across 20,000 miles? "NFL Road Tested: The Cleveland Browns" is a new series that goes behind the scenes to capture the massive mobilization. 10 p.m., Travel Channel.
WEDNESDAY: LL Cool J and Taylor Swift co-host "The Grammy Nominations Concert Live! -- Countdown to Music's Biggest Night," which we assume will be just a bit longer than that title. Maroon 5, Ne-Yo and fun. are among the scheduled performers. 10 p.m., CBS.
WEDNESDAY: This truly does sound like a nightmare before Christmas: On "American Horror Story: Asylum," a killer Kriss Kringle wreaks havoc at Briarcliff, while Sister Jude (Jessica Lange) has a confrontation with the devil. 10 p.m., FX.
THURSDAY: It's time for Dwight (Rainn Wilson) and the gang to hold the annual Christmas party on "The Office," and you know what that usually means: chaos and mayhem. 9 p.m., NBC.
FRIDAY: Samuel L. Jackson returns to host "VGA Ten," or, for the uninitiated, the Video Game Awards. The program celebrates the year's greatest achievements in gaming and features sneak peeks at what's to come. 9 p.m., Spike.
SATURDAY: "The American Giving Awards" pays tribute to community champions from across the nation and five major U.S. charities. Joel McHale is our host. 8 p.m., NBC.