S7, E20: In this must-see, exciting live finale, all of the contestants from this season return for a special reunion and a chance to weigh in one last time and show America how much weight theyve all lost since beginning their weight-loss journeys. There are four contestants left, but America has voted on the two that fell below the yellow line in last weeks episode to choose who will be the third finalist in the game. After Americas vote is revealed and the third finalist is announced, the eliminated player will then weigh in with the other 12 eliminated contestants to compete for the $100,000 at home prize. And for the first time ever, America will also get to choose between two people to decide which one will be a contestant on the next season of The Biggest Loser. Then its the moment viewers have been waiting for, when one of the three finalists will be named this seasons Biggest Loser and win the coveted grand prize of $250,000. Alison Sweeney is the host, and trainers Bob Harper and Jillian Michaels also star.