Caroline Rhea ("Sabrina, The Teenage Witch") hosts this unscripted, one-hour series in which two competing teams follow comprehensive diet and exercise plans to undergo radical physical makeovers. After nine weeks of strenuous workouts at the hands of Trainers Jillian and Bob, it's payback time as the contestants turn the tables and "train" the trainers. This episode is also the final weigh in at the ranch, preceded by the contestants reflecting on this journey that has changed their lives, and followed by a vote to trim the players' numbers down to three. Tearful goodbyes then accompany the trio as they realize it is time to go back to their regular lives without the support of their teams and trainers.

After weeks of training and careful eating, it comes down to choosing the "biggest loser" in this special 90-minute season finale. The winner will be chosen during a live portion of the telecast.

This special post-finale episode follows up on some of the surprises announced in the season finale the week before. The champion of the entire competition and viewers discover more about the lives of the other contestants and their fighting spirit.