The Biggest Loser

Two new trainers and an engaging new twist spice up the Season 11 premiere.

The competition heats up with a challenge offering one group of contestants the chance for immunity.

The "unknown trainers" are revealed -- and the contestants square off to win a big advantage at this week's weigh-in from Chef Curtis Stone.

Contestants are tempted to eat their favorite food to win a game advantage.

After four long weeks, the "unknowns" move to the ranch and are reunited with the other contestants, who get to meet the new trainers for the first time. Host Alison Sweeney explains that the ranch contestants will be safe this week if they collectively lose more than 48 pounds, but for the "unknowns," they will be facing their first elimination all season. And both teams only get to see their ...

A Valentine's Day temptation puts one player in the hot seat.

Only one team gets to use the gym this week, and a wild challenge has contestants pushing a train.

Former UFC Heavyweight champ Bas Rutten guest stars, and two players are sent home.

The players go home for two weeks, and then return to run a 5k.

Teams square off in a mud pit challenge.

Host Alison Sweeney tells the remaining contestants that they will all be on one team this week.

One eliminated player returns and the contestants split into four teams.

Contestants hunt for Easter eggs and get a very special surprise.

The challenge winners get a night out in Hollywood, while the losers have to clean the ranch, plus one trainer gets shocking news at the weigh-in.

The contestants head to New Zealand for an unforgettable adventure.

The contestants go river surfing, zip-lining and bungee jumping in New Zealand.

NASCAR driver Clint Bowyer guest stars, along with past season "fan favorites" Ali Vincent, Tara Costa and Sam Poueu.

Fashion guru Tim Gunn guest stars in fan favorite makeover episode, and two lucky contestants win brand new cars.

"Finals Week" tests how much players have learned - and reveals who will be in the final four.

Season ten winner Patrick House guest stars.

"The Biggest Loser" revealed in exciting season finale.