Lariamly Allen

In this must-see, exciting live finale, 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 they've 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 week's episode to choose who will be the third finalist in the game. After America's vote is revealed and the third finalist is announced, the eliminated player will then weigh in with the other eliminated contestants to compete for the $100,000 "at home" prize. Then it's the moment viewers have been waiting for, when one of the three finalists will be named this season's "Biggest Loser" and win the coveted grand prize of $250,000!

The contestants are faced with the "ultimate temptation" this week when each team enters a room filled with each player's favorite foods. Whoever eats the most calories gets to choose which team will go train with the "unknowns" and the new trainers. Later, the stakes are high with a calorie-counting challenge that will give the winners what they want most -- letters from loved ones back home. The trainers confront a contestant they think threw the last weigh-in, and later, trainer Jillian Michaels puts trainer Bob Harper through an intense yoga workout to show the players what they'll ultimately be able to do once they lose weight. Then one player takes matters into their own hands to try and send a contestant home. Alison Sweeney hosts the series.

This week kicks off with host Alison Sweeney issuing a challenge to the ranch-based contestants: if they have a higher percentage of weight loss than the "unknowns" -- the contestants working out with the two new mystery trainers -- they'll all have immunity this week. The "unknowns" fuel the competitive spirit by delivering messages and surprises to the contestants at the ranch reminding them just how tough their competition really is. Then Dr. Huizenga gives sobering news to contestants about their health risks and their real ages vs. their chronological ages, but this time, loved ones from home are involved to really help drive the message home. Later, the ranch contestants' ability to work together as a team is tested when they try to beat the time of the unknowns in a wild bridge-building challenge using rafts. Then a tense weigh-in reveals whether the ranch contestants are safe from elimination, or whether they'll be sending another player home.

A ball challenge that turns out to be much harder than it looks gives the winning team a big advantage at this week’s weigh-in, which is especially valuable given that both a red line and a yellow line will result in two players going home. Trainers Bob Harper and Jillian Michaels try to teach their contestants to push beyond the limits they’ve set for themselves, while trainers Cara Castronuova and Brett Hoebel take their team for an intense workout at a Mixed Martial Arts gym owned by contestant Rulon Gardner’s former trainer, retired UFC heavyweight champion Bas Rutten. Then a weigh-in filled with surprises is followed by two contestants leaving the ranch. Alison Sweeney hosts the series.

The contestants are excited to hear from host Alison Sweeney that they will all be going home for two weeks. Each player returns home to emotional reunions with friends and family, after which they navigate the challenges of being back in their real lives, facing the same temptations that brought them to the ranch and realizing all of the things they are capable of doing now that they couldn't do before. When they come back to the ranch, they'll compete in a 5K challenge on a treadmill just as they did in the first episode of the season, but this time, they're going to run the 5K all by themselves. And just as before, each will pick who they want to train them -- Bob Harper and Jillian Michaels or Cara Castronuova and Brett Hoebel -- in the order in which they finish the challenge. Then a few contestants reach milestones at the weigh-in, after which another player is sent packing.