A mysterious dead man is found in a crater with his body flattened as if he had fallen from the sky. Brennan and Booth try to find out who the man was while Hodgins comes up with different conspiracy theories involving aliens. Booth and Brennan find out the man was an astronaut who was murdered, and a complicated murder case unfolds.

Last night, the Top 6 finalists sang their hearts out in hopes of winning America over. Find out tonight who will be in the Final 4 and which 2 will go home, and enjoy a special live performance by Bon Jovi

After Tim and Cindy Devlin's sudden divorce announcement, Andy starts spending time with Cindy, which turns into a relationship, and an urge for Cheryl and Jim to break them up.

The BAU is called to investigate after the bodies of missing people are discovered in a remote region of the Idaho wilderness. The gruesome find also leads the team to determine the unsubs have been hunting humans for sport.

A woman that has been presumed dead for the past six years actually has just died a few hours earlier and has caused Jordan and William Ivers to team up on this peculiar case. Woody and Bug are called to help Lily and Brandau when the psychiatrist they have been seeing suddenly dies in front of them during their session. At first they all believe that it was a heart attack until they find a mysterious stab wound. Lily suddenly goes into labor and the team helps her deliver.

New Bern begins to pound the streets of Jericho with mortars, forcing Gray to make a decision whether to fight against New Bern or surrender. Jake wants to use his father's military experience to help win the battle. Emily steps into her father's world and is exposed by the enemy. Hawkins and Darcy decide to stay in Jericho and fight against New Bern.

It's Prom night, but things start to go awry as Lucas discovers who was the person in the hallway when Keith was killed, and Psycho Derek holds Peyton hostage at her own house. Meanwhile, Haley and Nathan vow to be romantic with each other throughout the night, and Dan continues to win over Karen's affections.

The remaining five contestants are sent on a mission to impress Australian designers in their go sees. While there, one model shocks designers by requesting to keep the clothes and another has a rage after arriving late. Later, Tyra gives the girls a shoot where they must model swimsuits for a women's magazine. One model impresses Tyra, while another simply falls flat.

An ordinary trip to the mall for makeup becomes extraordinary when Julie's water prematurely breaks, sending her into labor but not without her cosmetics in tow. While Eric rushes home from a business trip to be present for their baby's birth, Julie enlists the help of her friends, Andrew and Lauren, who abruptly abandon their weekend getaway - while Danny ensures that their hotel, spa appointments and romantic plans do not got to waste. Having read every book on pregnancy he could get his hands on, Andrew offers Julie some valuable, if not humorous, advice while she's in labor. Meanwhile, a less than thrilled Cooper reluctantly agrees to capture the birth on video.

Mac believes he can fight the Internal Affairs investigation that is about to be started against him because of what happened to Clay Dobson. Can Mac explain what happened to the suspect he was chasing and will it be good enough for him to keep his job? Also Stella could lose her job as a CSI after a cold case is somehow connected to her.

After abandoning the Others, Locke takes Sawyer on a trek through the jungle to help him eliminate a common enemy. Meanwhile, back at the beach, the parachutist Naomi has crucial information about flight 815.

Allison is confused when her dreams of a man murdering his wife keep occurring, even after she helped Devalos convince the jury of the suspected killer's guilt. Through her troubles she manages to make a new friend named Debra. Meanwhile, Joe is frustrated by the therapy sessions that his job enrolled him in, and can't express his feelings to Allison because the recent hostage situation he was in is still greatly affecting him.

Coming Soon...

Tonight, director Pierre Rehov promotes his new documentary out on DVD, Suicide Killers.
Jon begins the show with a good old fashioned Washington D.C. sex scandal. Deborah Jeane Palfrey a.k.a. Miz Julia, has submitted 46 pounds of telephone records from an escort service she ran for 13 years. Jon looks at the media frenzy to see which powerful D.C. men are on the list in a segment called "Beltway: Unbuckled". Senior Washington Correspondent Jason Jones talks with Jon about the how one can hire an escort legally and for nonsexual reasons, namely, by always laying down on your stomach while you get your "massage". Finally, Aasif Mandvi takes a look at both sides of the debate over Chief Illiniwek, the mascot for the University of Illinois at Urbana-Champaign who recently was retired because of protests saying the chief perpetuated rascist stereotypes in a segment called "Trail of Cheers".

Tonight Stephen welcomes New York Times reporter and author of Rethinking Thin: The New Science of Weight Loss and the Myths and Realities of Dieting, Gina Kolata.

Guests include Sarah Beeny (Property Ladder, Streets Ahead, Britain's Best Homes), Dawn French (French and Saunders, The Vicar of Dibley).