In this special reunion episode, the beauties and the geeks are reunited in New York, where they reminisce about their good and bad times in the competition, new never-before-seen footage is revealed, and updates on the lives of the contestants are shared.

Of the 24 semifinalists chosen last week, the Top 12 girls will perform for America for the first time. Then its up to the viewers to vote for their favorites. Who will survive and who will go home?
Performing tonight are:

Alaina Alexander

Amy Krebs

Antonella Barba

Gina Glocksen

Haley Scarnato

Jordin Sparks

Lakisha Jones

Leslie Hunt

Melinda Doolittle

Nicole Tranquillo

Sabrina Sloan

Stephanie Edwards

Yasir's overbearing mother arrives from Lebanon with an exciting new proposition. Sarah is shocked to find that mother Hamoudi has plans for Yasir to take a second wife! Mayor Popowicz advises Sarah to fight back and take a second husband. Meanwhile, Reverend Magee ponders whether he should perform a gay marriage, amidst the protests of just about everyone. Yasir eventually solves his marital problems with a clever scheme that convinces his mother that one wife is enough.

Cornish hens are small and delicious, but have the same dangers of their larger brethren. Alton gives a crash course on how to avoid illness with the tiny birds, featuring his Four Cs of food safety: Contain, Clean, Cook and Chill.-

When Rockefeller finds out there won't be any security for Mick Jagger's apartment over the weekend, the Knights are finally able to get inside. But their fun doesn't last when they find out they can't leave the apartment and they find themselves locked up in Mick's panic room.

The BAU travels to Houston to investigate a series of murders that have occurred near construction sites and abandoned buildings. Because the murders appear to be random, the team believes the killer could be a homeless person. Meanwhile, everyone is noticing an apparent change in Reid's behavior.

After Julie reveals to Matt that she wants to have sex with him, Matt feels the need to put together something special. Tim clashes with his father. The Panthers are into the next round of the playoffs and looking solid.

Flashbacks reveal parts of Jake and Hawkins' pasts as well as what happened 36 hours before the bombs went off. During this time, Jake is in San Diego trying to make a living and Hawkins' mysterious past is made more complex when his association with a woman named Sarah is shown. Elsewhere, Emily's fianc? Roger leaves for Chicago on a job interview. Back in present day, Roger and Sarah arrival in Jericho raises even more questions.

It's Prom day, and emotions are flying high at Tree Hill. An emotional Haley confronts Nathan about the sex tape and asks for a list of all his past sexual encounters. Meanwhile, an angry Peyton asks Lucas to skip the dance altogether, but he refuses to take no for an answer. Finally, Brooke and Peyton let out all their tension in a confrontation that can tear them apart forever.

Danny and Mac have to go to Noahs Ark to find out if a broken promise leads to his murder. Stella and Sheldon investigate the death of a man dressed as a cigarette. Stella hopes to have her job after not telling Mac that she may be HIV right away.

As Kate and Sawyer journey back to the main island with Karl, who is exhibiting effects of the brainwashing video, they argue over whether to go back and save Jack. On Hydra island, as Juliet's fate rests in his hands and a power struggle within the Others ensues, Jack recollects the time he spent in Phuket, Thailand and his relationship with Achara, a mysterious tattoo artist.

Allison has a dream that takes place about 20 years in the future in which Marie dies of leukemia. Upon waking up Allison is determined to keep Marie safe no matter what needs to be done. Joe strongly disagrees with Allison's actions and tries to convince her to stay rational. Meanwhile Scanlon investigates the sudden death of a close friend.

Coming Soon...

Tom's career and relationship is left in ruins after his indiscretion is exposed. After another attack is reported Izzie becomes protective of her daughters. Lewis encourages Maxie to cause trouble.

Adrian Tintagel, the leader of a strange cult, checks in. Then Anna discovers Tintagel's doomsday mission and finds herself in danger. Meanwhile, a Premiership football team is staying at Hotel Babylon. While their nefarious requests do not bother Tony, their appalling behaviour towards the hotel staff tips him over the edge.

Sid is in trouble, deep trouble. His coursework hasn't made the grade, he's as sexually frustrated as ever, and he can't get his best mate's girlfriend, Michelle, out of his head!

Graham Norton talks to Lord of The Rings actor Elijah Wood and Sex and the City actress Kim Cattrall, who talks about the ongoing Sex and the City movie rumour. Plus there's a exclusive performance from Elijah Wood's new signing Heloise and the Savoir Faire.