TONIGHT: American Idol contestants will murder songs by Lennon and McCartney, America's Funniest Home Videos' $100,000 winner is announced, and a few of our favorite time travelers are back on tonight's episode of Lost.

8:00 PM

American Idol The top nine performances sing the songs of John Lennon and Paul McCartney. (Fox)
Dancing With the Stars Reba sings two songs, Mark Ballas performs on the acoustic guitar, and one contestant is eliminated... fingers crossed for Kate Gosselin. (ABC)
The Biggest Loser: Couples Players can win immunity by becoming the first contestant to lost 2% of their body weight. (NBC)
90210 Adrianna and Gia go public with their relationship, Naomi goes forward with her sexual harassment claims, and Dixon and Ivy go on a fake date. (The CW)
NCIS The death of a Naval officer is linked to a prostitute. (CBS)
Nova Part One of Two. Tonight's Nova is titled "Hunting the Edge of Space: The Mystery of the Milky Way" and will focus on how the telescope revolutionized the understanding of our universe. (PBS)

9:00 PM

LOST I'm not one to spoil Lost for anyone, so let's just say that a bunch of our favorite castaways that we haven't seen all season will be back in tonight's Desmond-centric episode. (ABC)
Melrose Place Ella does whatever she can to save her job—much to Jonah's dismay—and Lauren helps David out of a jam. (The CW)
19 Kids and Counting The Duggars explore Little Rock and the Arkansas Museum of Discovery. (TLC)
NCIS: Los Angeles When the murder of a Marine is connected to a mixed-martial-arts gym, Sam goes undercover as a fighter. (CBS)

10:00 PM

America's Funniest Home Videos The finalists for a $100,000 prize include: a girl who mistakes a radish for an apple, a Chihuahua's bathroom habits, a man who converses with animals, a boy at a Christmas pageant and a toddler who wants out of his crib. (ABC Family)
Law & Order: Criminal Intent Part Two of Two. Goren and Eames clash with the Feds over a murder investigation involving a complex political power play while also dealing with a loss. (USA)
Millionaire Matchmaker Tonight's millionaires include an internet entrepreneur and a smooth-talking attorney from Florida. (Bravo)
Parenthood Max works with a behavioral aide (played by Minka Kelly) while Kristina tries to keep her worrying in check, Sarah considers going on a date with Amber's teacher, and Crosby gets ready to tell his parents about Jabbar. (NBC)
Southland John's ex-wife asks for a favor after he's sent out to catch a rapist who's impersonating a cop while Susan learns about Sal's affair. (TNT)
The Good Wife While dealing with the mounting sexual tension between them, Alicia and Will defend a college student accused of killing her roommate while on sleeping pills. (CBS)
V Anna launches a pilot program to allow select humans to live on their spaceships, Tyler uncovers a secret about his mom, Valerie's accelerated pregnancy becomes an issue for Ryan, and some kind of sacrifice is made for Ryan. (ABC)
16 and Pregnant Leah, a high school cheerleader, is expecting twins with a boy she's been dating for only a month. (MTV)
Chopped The featured ingredients are rattlesnake meat and red jalapeños. (Food Network)
Little Chocolatiers A man orders a chocolate bust of himself for his employees to eat. (TLC)

Who's on the Late Night Couches Tonight?

The Daily Show: Capt. Richard Phillips (Comedy Central)
The Colbert Report: Joe Bastardi, Brenda Ekwurzel, Rev. Al Sharpton (Comedy Central)
Jimmy Kimmel Live: Kobe Bryant, the latest "Dancing With The Stars" castoff, Kelis (ABC)
Lopez Tonight: Brandy, Ray J (TBS)
The Tonight Show with Jay Leno: Kirstie Alley, David Boreanaz, Slash & Andrew Stockdale (NBC)
Late Night with Jimmy Fallon: Christopher Meloni, Taraji P. Henson, Dr. Dog (NBC)
Last Call with Carson Daly Ludacris, the Living Sisters (NBC)
Late Show with David Letterman: Steve Carell, "American Idol" castoff Didi Benami, Broadway musical "Addams Family" (CBS)
Late Late Show with Craig Ferguson: Mindy Kaling, Dom Irrera (CBS)