Mike Danley

In this inspiring Thanksgiving special unlike any before on "The Biggest Loser," viewers can catch up with some of their favorite contestants ever, but they'll also be treated to never-before-seen footage and -- for the first time ever -- hilarious bloopers featuring the trainers, host Alison Sweeney and the contestants. And trainers Bob Harper, Anna Kournikova and Dolvett Quince will all be on hand to share their thoughts about the current season of the show. Fan favorites like Abby Rike, Tara Costa, O'Neal Hampton and season five winner Ali Vincent will reveal what they're up to now, along with season eight champ Danny Cahill, season 11 winner Olivia Ward, and other popular players. One contestant makes a big surprise announcement, and cameras will also follow trainer Bob Harper through "a day in the life." Plus, cooking expert Aida Mollenkamp will prepare a healthy Thanksgiving feast for the trainers and past season contestants, and share great cooking tips as well. Alison Sweeney hosts the special.

The contestants start their week with a holiday food temptation involving Thanksgiving favorites and amazing prizes, including a coveted 3 lb. advantage. Later, trainers Bob Harper, Anna Kournikova and Dolvett Quince prepare a healthy Thanksgiving dinner for the players, and everyone shares what they are most thankful for, with one trainer sharing a surprising revelation. Then it's the toughest challenge of the season so far with an outdoor, one-mile high climb on Jacob's Ladder treadmill climbers. The top finishers win special prizes with a "Pay it forward" twist. Later, one contestant does something considered uncharitable by the others, leading to friction at the elimination table before another player is sent home. Alison Sweeney hosts the series.

It's a NFL week at the ranch, and the competition to be the Biggest Loser of the week is fiercer than ever with the weigh-in winner getting an amazing prize -- a VIP trip for two to the Super Bowl! Host Alison Sweeney reminds the contestants that if they want to be the best, they have to beat the best at a football throwing challenge in which they compete alongside Green Bay Packers linebacker Clay Matthews, New Orleans Saints quarterback Drew Brees and Atlanta Falcons tight end Tony Gonzalez. One player really struggles emotionally this week, while another remains determined despite being partially sidelined with an injury. There's a grueling, calorie-burning competition among the three teams led by trainers Bob Harper, Anna Kournikova and Dolvett Quince. And later, Denver Broncos quarterback Tim Tebow, Buffalo Bills linebacker Shawne Merriman and Hall of Famer Eric Dickerson help put the contestants through last chance workouts they'll never forget before a tense weigh-in reveals which player gets the coveted Super Bowl tickets.

The competition shakes up this week when contestants change teams and trainers in a high-stakes, calorie-counting challenge that will determine who each player's trainer will be for the rest of the season. After the teams are re-aligned, dramatic confrontations follow between some players and trainers as they all try to adjust to their new reality. Later, the new teams face their first challenge together -- racing down a water slide on a hill to unscramble block letters that reveal the winning team's prize. Trainers Bob Harper, Anna Kournikova and Dolvett Quince each take their teams off the ranch to spice up their last chance workouts, and later, an especially emotional elimination follows a weigh-in revealing noteworthy results from the trainer/team switch. Alison Sweeney hosts the series.

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.