During the last episode taped at the ranch, the final four contestants discover how far they have come in terms of weight loss and exercise by doing the same workout from their first day at the ranch. For their challenge, they have enough quarters to equal the weight they have lost since the first episode placed on their backs. Weighted with coins, they must scale the side of the building, and then make a second trip up the side minus the extra weight. The contestant with the most improved time between the climbs wins, and even gets to keep their quarters.

After weeks of training and careful eating, it comes down to choosing "The Biggest Loser" in this special two-hour, live season finale. Only three contestants remain in the contest to see who has the biggest percentage of weight-loss. The winner will be chosen during the live portion of the telecast.

The show that inspired the nation to get healthy is back with 50 contestants, one from each state in the country. New surprises await the contestants including the addition of fitness veteran, Kim Lyons as the new red team trainer. The contestants will quickly learn that only 14 of them will stay and train at the ranch while 36 will go home to compete on their own with a chance to make it back to the ranch and win $250,000. In the first challenge, the teams will square off in a wall scaling competition for the power to switch one team member's weight-loss with someone on the opposing team.