Liam, Dixon and Ivy (Matt Lanter, Tristan Wilds, guest star Gillian Zinser) plan to confront Naomi (AnnaLynne McCord) at the horse races in this new episode (8 p.m. CW).
So You Think You Can Dance: The top 10 contestants perform (8 p.m. Fox).
Melrose Place: Amanda (Heather Locklear) moves into the penthouse formerly occupied by Sydney (Laura Leighton) and takes a very special interest in David (Shaun Sipos), who's growing closer to Lauren (Stephanie Jacobsen), in this new episode (9 p.m. CW)
Invitation Only: "American Idol's" Carrie Underwood performs for fans in this new installment (9 p.m. CMT).
Dirty Jobs: Host Mike Rowe heads to Alaska to work on a reindeer farm in this new episode (9 p.m. Discovery).
The Best Thing I Ever Ate: The network's culinary stars recall their favorite holiday dishes (9 p.m. Food).
Sons of Anarchy: This gritty biker drama starring Ron Perlman and Katey Sagal ends its second season (10 p.m. FX).
Sherri: This sitcom starring "The View's' Sherri Shepard presents its first season finale (10 p.m. Lifetime).
The Hills: The reality series signs off for another season, followed by the season finale of "The City" (10 and 10:30 p.m. MTV).
SPECIALSChristmas Outside of the Box:
The origins of Christmas rituals are explored in this new special (7 p.m. TLC).
Presidential address: Broadcast networks and cable news channels will offer live coverage of President Obama's speech on the war in Afghanistan (5 p.m.).
Generation Free: Filmmaker Nigel Barker heralds the work of the Elizabeth Glazer Pediatric AIDS Foundation in Tanzania in this new documentary (7 p.m. TV Guide).
The Victoria's Secret Fashion Show: Heidi Klum hosts, lingerie models model lingerie, and the Black Eyed Peas perform at the annual event in New YorkCity (10 p.m. CBS).
A young emperor penguin expresses himself and hopes to attract a mate through his amazing dancing talent in this computer animated 2006 hit featuring the voices of Hugh Jackman, Nicole Kidman, Hugo Weaving, Robin Williams and Elijah Wood (8 p.m. Disney).
Wake Forest plays Purdue (4 p.m. ESPN); Maryland meets Indiana (4:30 p.m. ESPN2); Michigan State battles North Carolina (6 p.m. ESPN); and Virginia Tech visits Iowa (6:30 p.m. ESPN2).
Basketball: The Lakers welcome the New Orleans Hornets (7:30 p.m. FSN).
Hockey: The Ducks host the Kings (7:30 p.m. FSN2).