STAGE TUBE: Sneak Peek - Poker Pop Challenge on Tonight's BIGGEST LOSER on NBC

On tonight's episode of NBC's THE BIGGEST LOSER, contestants try to gamble their way to a weigh-in win with poker pop challenge. The stakes are high this week when representatives of each team bid on the percentage of weight they think their team will lose at the weigh-in. The highest bidder gets a five-pound advantage if they hit their number at weigh-in - or lose the advantage to the other team if they don't hit their mark. "The Biggest Loser" nutritionist teaches the contestants how to shop for healthy food, and the black and red teams square off in a fast-paced challenge in which they have to turn an anchor wheel to retrieve puzzle pieces and then race against the clock to put the puzzle together. And later, The Players get a sobering wake-up call when Dr. Huizenga reveals their real "inner ages, " before the weigh-in leads to another player going home.

THE BIGGEST LOSER returned with a bang for Season 13 when the contestants arrive at the ranch and get one of the biggest surprises ever in the series' history. They arrive in teams of two - including mother/daughter, father/son, brother/sister and husband/wife, all eager to change their lives together. But they're shocked to discover that they will not only be split up - they will also be competing against the person they came with. They'll be pushed out of their comfort zones in a way they have never been before - and one team won't even make it on to the ranch - as the season of "No Excuses" begins.

To get a sneak peek at tonight's episode airing at 8:00  pm ET on the NBC network, click below!