STAGE TUBE: Sneak Peek - THE BIGGEST LOSER Contestants Compete in a Pentathlon on Next Week's Show

On next week's episode of NBC's THE BIGGEST LOSER, the competition heats up as host Alison Sweeney tells the remaining seven players that they will be competing in a pentathlon - and they can only rely on themselves because this week, the game goes to singles. Contestants will earn points in each of the five events, which will test everything from speed to strength to nutrition knowledge. The pentathlon winner gets the coveted prize of immunity, while the loser gets a weigh-in disadvantage.

The Players get a very special surprise when eight-time Olympic medalist Apolo Ohno arrives to lead the contestants through their final event, motivating them each step of the way. Also, one of the trainers reveals details about their difficult childhood to a contestant who is struggling with trust issues. And later, the weigh-in is followed by the most emotional elimination of the season so far.

THE BIGGEST LOSER Season 12 includes two new trainers - renowned tennis star and certified trainer Anna Kournikova and fitness expert Dolvett Quince - joining "Biggest Loser" veteran Bob Harper. Under their supervision, 15 contestants came together hoping to transform their bodies, their health and ultimately, their lives.

To view a clip from upcoming episodes of the weight loss competition, click below!