Booth and Brennan are called to the scene where a man's body was found hung like a scarecrow, gutted, and burned on the roof of a building used by the FBI to hide witnesses.

Morgan is arrested as a serial killer after he goes home to Chicago to visit his family. Because the detective making the arrest had used a profile provided by Gideon, the team travels to Chicago to help the local authorities find the real killer and exonerate Morgan.

Tonights guests include Regis Philbin and Robert Randolph, plus Lee Marek's Kid Scientists!

Adam and Jamie explore the improbable survival of a WWII gunner with some of the biggest explosions in the show's history! Can someone fall 22,000 feet and be saved by a bomb? Also, the Build Team explores light-bulbs and energy usage. Does leaving the light on help?

After spending several weeks of diet and exercise with their trainers at the ranch, the final four contestants weigh-in for one last time to reveal who is The Biggest Loser and the winner of the $250,000 grand prize. In addition, the other remaining 46 contestants will return as well to reveal their new selves.

Tonight Stephen welcomes historian and author of "Team of Rivals, The Political Genius of Abraham Lincoln", Doris Kearns Goodwin.

It's all a party when the contestants are asked to put their skills to work on both hors d'oeuvres and spirits. This round focuses on entertaining as the chefs are first asked to create an original drink accompanied by a small snack, then they must change gears and cater a holiday event. Guest Judge: Kristin Woodward – QuickFire Challenge Guest Judge: Lee Hefter – Elimination Challenge QuickFire Challenge: Create an Original Bailey's Holiday Cocktail. Elimination Challenge: Cater a Hollywood Holiday Party.