The Biggest Loser

Inspiring contestants, including show's first celebrity player, Ruben Studdard, uplifting "second chances" theme and powerful new roles for the trainers highlight Season 15.

The dreaded "week 2 curse" is on all the players' minds, especially when they learn that only one person's weight on each of the three teams will count at this week's weigh-in.

This week, the contestants are surprised to find that the gym is empty -- and the only equipment they'll be able to use is equipment they've successfully bid on with "Biggest Loser" bucks in the show's first-ever auction, run by host Alison Sweeney.

It's Halloween at the ranch, and that means a pumpkin challenge and the contestants' first temptation of the season. Prizes include cash and a winning ticket giving one player one of the biggest prizes ever awarded in a challenge.

Last season’s kid ambassadors Biingo, Lindsay and Sunny return to the ranch and are joined by the White House Senior Policy Advisor on Nutrition, Sam Kass, for a fun cooking challenge with the contestants.

It's a busy week at "The Biggest Loser" ranch, which kicks off with a fun bouncing ball challenge that will award members of the winning team a welcome cash prize.

Contestants pay it forward with a special Thanksgiving challenge, and the winning team gets a holiday dinner with loved ones.

One contestant goes home with their trainer, and has to lose enough weight to keep their whole team safe.

The contestants take a pop quiz about obesity in the workplace after meeting Alison in a diner. The location proves significant since that's where the losing team will be working while still trying to eat healthy and exercise with much busier schedules.

The competition goes from teams to singles. Wearing their new individual color shirts, the players meet host Alison Sweeney for a night-time "ring of fire" endurance challenge that involves holding a percentage of their individual weights.

This week kicks off with all of the eliminated contestants returning to weigh-in, and one lucky player getting the chance to return to the competition.

This week kicks off with all of the eliminated contestants returning to weigh-in, and one player getting the chance to return to the competition.

Contestants train like athletes at Utah Olympic Park and meet Olympians Apolo Ohno, Lolo Jones and more.

Contestants train like athletes at Utah Olympic Park and meet Olympians Apolo Ohno, Lolo Jones and more.

Fashion Guru Tim Gunn and celebrity hairstylist Ken Paves guest star in the "Fan Favorite" makeover episode.

Fashion Guru Tim Gunn and celebrity hairstylist Ken Paves guest star in the "Fan Favorite" makeover episode.

The last five players compete in the show's first-ever sprint triathlon to win a guaranteed spot as a finalist -- and a brand new car.

In this must-see, exciting live finale, the 15 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.

In this must-see, exciting live finale, the 15 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.