The Biggest Loser

Season 10 premieres with a new theme of "paying it forward" and 21 contestant hopefuls competing to make it to the ranch.

Contestants are surprised by new players and shocking weigh-in twists.

Anna Kournikova teaches tennis to the Biggest Losers.

Popular Chef Curtis Stone teaches contestants to make a healthy dessert and Bob Harper invites the players to his house for dinner.

Five players return to the ranch to compete for a spot in the game, and the winner gets game-changing power.

Celebrity Chefs Curtis Stone and Lorena Garcia Guest Star.

The contestants live and train like Marines at Camp Pendleton.

One player wins the power to pair off the others, leading to the most explosive weigh-in all season.

The competition goes to singles, and players get heartwarming videos from home.

It's one of the most eagerly anticipated events every season -- "The Biggest Loser" makeover episode!

Olympic Gold Medalist Nastia Liukin Guest Stars, and two more players go home, leaving the final four.

The final four contestants face their toughest challenge yet -- running a marathon -- while being cheered on by family and friends.

"The Biggest Loser" is revealed in the exciting season finale!