After weeks of training and careful eating, it comes down to choosing "The Biggest Loser" in this special two-hour, live season finale. The final four contestants weigh-in one last time for the chance to win the grand prize of $250,000. Jaw-dropping transformations will be seen as all 50 contestants return to reveal their newly slimmed bodies.

In the two-hour season premiere episode, the contestants are dropped in the middle of the desert and trainers Bob Harper and Kim Lyons dramatically skydive to the ground below about a mile away from them. New host Alison Sweeney explains that the first two contestants to reach the trainers will become team captains and will have the tough decision of picking five team members each. Sadly, they realize that means six people will be going home before the game has even begun. Once the teams are picked, the rejected contestants are heartbroken that their journey is already over. But in the new season twist, former trainer Jillian Michaels returns and the rejected contestants learn they will comprise a secret black team!.

The countdown to the surprise reveal of the secret black team trained by Jillian Michaels has begun in this action packed two-hour episode! Meanwhile, the blue and red teams continue to work out with their respective trainers, Bob and Kim, and prepare for this week's competition. Immunity is on the line at this week's challenge, which sends the teams racing up the stairs of a ten-story building. As the contestants head into the weigh-in room, they are shocked to see the black team standing in front of them.