Watch The Biggest Loser Season 9 Full Episodes

After viewer votes determine the third finalist, the winner of the $250,000 prize is crowned in the Season 9 finale. The eliminated players also...

The players train for a marathon at home and must work to stay on track while away from the ranch. During the race, the contestants receive support...

Quarterback Tony Romo takes the contestants on a hike; past winners Helen Phillips and Erik Chopin discuss the challenges of keeping weight off away...

The final six contestants receive makeovers, which include a $1000 shopping spree and a salon visit with stylist Jonathan Antin. After the...

The players go to Dallas to run a 5K at the Cotton Bowl and recruit locals to join them for the race. Later, a contestant wins immunity by wrangling...

The contestants choose food from a buffet table offering low- and high-calorie choices; Gabrielle Reece, pro volley ball player, leads a...

Suze Orman assesses the players' financial health and predicts who will win this season. Also: The contestants balance quarters on a platter to win a...

The players have a chance to win immunity by becoming the first competitor to lose 2 percent of his or her body weight. Each person only has one...

The teams are dissolved as eliminated contestants return to vie for spots back on the ranch. One player is chosen through a vote while another wins a...

The contestants visit home and must continue dieting and exercising while away from the ranch. Soon after arriving, the players receive stationary...

The players compete in a 30-minute cook-off, which requires them to prepare an appetizer, entrée and dessert using only 12 ingredients. Judges...

The teams pull trucks and load crates onto the vehicles for a challenge that ends with a puzzle. Later, the contestants work eight-hour shifts at the...

This week's first challenge is a temptation with, literally, hundreds of cookies. Ali tells the teams that whoever wins this temptation challenge...

It’s a star-studded Olympic-themed episode of “The Biggest Loser: Couples” to help kick off the winter games! This week, the contestants head...

This week, contestants are surprised by the return of the blue and yellow teams, who were sent home after the first challenge of the season. Now...

This week starts off with a high-stakes pop challenge in which contestants race for the prize of immunity - and the winning team also gets three...

The contestants assume the role of either teacher or student; a challenge grants immunity to the winning team; a contestant threatens to quit the...

Dr. Huizenga delivers sobering news to the contestants; the contestants compete in a balance challenge over a pool; Jillian Michaels encourages a...

Bob and Jillian take turns making phone calls to the latest couples that will be arriving at the ranch. Each trainer is met with loud cheers and...