Season 12 kicks off with two new trainers – internationally renowned tennis star and certified trainer Anna Kournikova and top fitness expert Dolvett Quince – joining “Biggest Loser” favorite Bob Harper, and 15 contestants competing in a “Battle of the Ages” that will group contestants by age for the first time ever in the history of the show. Host Alison Sweeney tells the teams that they will make their first game-changing decision – who their trainer will be – in the order in which they finish the first challenge. Once each team chooses their trainer, “The Battle of the Ages” begins. The new contestants include Vinny Hickerson, who overcame a difficult childhood to become a successful Nashville recording artist, Antone Davis, a 447-pound father of four and former NFL player for the Philadelphia Eagles and Atlanta Falcons, and Bonnie Griffin, a 63-year-old grandmother of six who lost her home to Hurricane Katrina and lost her husband not long after.

Gym-time restrictions are put into place, allowing each team only two hours a day to work out. Elsewhere, the contestants receive health evaluations from Dr. Huizenga, who delivers particularly shocking news to one player; and the teams move a ball through a maze during a challenge.

The players compete for Super Bowl tickets during NFL week at the ranch. Pros Clay Matthews, Drew Brees and Tony Gonzalez head up a football-throwing challenge, while Tim Tebow, Shawne Merriman and Eric Dickerson conduct last-chance workouts.

Contestants from past seasons return to inspire the current players; after a challenge where the teams battle the elements, the winners receive a special bonus prize; contestants face elimination.

A player goes home and takes a trainer along for the trip. But the prize comes at a cost: the player's weight is the only one that counts for the team at the weigh-in. Elsewhere, the contestants at the ranch navigate a maze to fill a cylinder with soda; and a trainer lashes out at a player who hides behind humor.

The teams merge into one and learn that they have a chance to avoid an elimination if they're able to collectively lose 100 lbs. during the week. A candy-temptation setup complicates their efforts, however. Also: The players navigate a haunted maze and collect apples during a Halloween-themed challenge

The contestants swap teams and trainers after a calorie-counting challenge, and the realignment causes some tension. Later, the new teams face their first challenge together; and the trainers hold last-chance workouts away from the ranch.

The trainers pick one player to represent their teams at the weigh-in. Elsewhere, the contestants work under a time limit to prepare low-calorie dishes for Season 11 champ Olivia Ward and cookbook author Devin Alexander; and Dr. Huizenga delivers good news to a player.

The seven remaining players learn they will be competing as individuals and will be taking part in a pentathlon; Olympic medalist Apolo Ohno motivates the contestants; a trainer shares personal details with a struggling player.

The trainers prepare Thanksgiving dinner for the players, who also face a temptation challenge with a three-pound advantage prize for the winner. Elsewhere, a tough challenge requires the players to climb one mile on Jacob's Ladder treadmills.

The five remaining players receive makeovers with help from stylist Jeannie Mai and hairdresser Ken Paves. Later, they show off their new looks to family and friends before attending Cirque du Soleil's "Iris."

The eliminated players return to run a marathon, and the winner earns a spot as a finalist. The first five players to finish also receive a share of a $50,000 prize. Later, the contestants weigh in to determine which two move on to compete in the finals.

The winner of the $250,000 prize is crowned in the Season 12 finale. The eliminated players also return to weigh in for the $100,000 at-home prize.

A new batch of couples arrive at the ranch and are shocked to learn they'll be split up to compete against each other in the Season 13 premiere. The new round has a "No Excuses" theme, and the trainers address the reasons the contestants are overweight.

The teams bet on the percentage of weight they think they'll lose in order to gain an advantage at the weigh-in. Elsewhere, the contestants learn to shop for healthful foods; the teams compete in a puzzle-based challenge; and Dr. Huizenga performs sobering health assessments.

A Chinese-buffet temptation offers the winner a two-pound advantage at the weigh-in and an opportunity to match up players for a gym challenge. Later, the teams compete in a water-transfer challenge for the chance to video chat with loved ones; a player makes a shocking decision.

The teams compete for exclusive use of the gym during a battering-ram challenge. Bob and Dolvett, meanwhile, try to get through to contestants they feel aren't putting in enough effort to shed pounds.

The players compete in a trampoline challenge to win the chance to exclude a contestant's weight from the weigh-in. Elsewhere, two eliminated players return for a chance to win a spot at the ranch, and personality clashes cause tension in the house.

One team must work out for a week without the guidance of their trainer, who secretly monitors his players to track their progress. The losing team is determined by a dunk-tank challenge, in which Bob and Dolvett are suspended over water and must rely on the contestants to keep them dry.

Two players visit home with their trainers in tow, and their weights alone count at the weigh-in. Elsewhere, the teams compete in an obstacle course in order to receive letters from loved ones for Valentine's Day; the players at the ranch must fend for themselves, though one contestant turns to nutritionist Rachel Beller for help preparing a special meal.

A temptation-challenge winner reorganizes the teams in an unpopular move that creates tension and suspicion among the players. Elsewhere, the teams race to assemble a large puzzle in order to win a special prize.

The contestants go home for 18 days and have a chance to earn immunity if they lose five percent of their body weight. While some struggle to stay on track, others benefit from the support of family and friends. Also: a home rowing challenge earns the winner $10,000.

This week, the age-old excuse "I'm stuck in my comfort zone" is addressed as contestants are pushed out of their comfort zones by switching trainers for the week. The red team works out with trainer Bob Harper, while the black team burns calories with trainer Dolvett Quince. And one trainer gets out of his own comfort zone by trying ballet with his female contestants! Also, the teams get down and dirty in a 70-foot wide mud pit, filled with various weight plates they have to find in a messy challenge that will give one team a big advantage. Then it's time for the weigh-in, followed by an emotional elimination sending one more player home.

The teams are dissolved, leaving the nine remaining players to compete on their own. Later, a tug-of-war contest finds the contestants competing for a shopping spree with Jessica Simpson; a trainer helps a player face her fear of heights; and a contestant turns the tables on a trainer.

The contestants go to Hawaii to test their ability to lose weight during vacation. During the trip, the players face off in a trivia contest and a challenge involving tikis and leis. Later, surfer Bethany Hamilton gives the gang surf lessons.

Season 12 favorites Antone, Becky and Vinny return to judge a cooking contest and offer the players advice. Elsewhere, the contestants' exercise routines are spiced up with a Zumba class and mountain biking; and the players load food onto trucks during a pop challenge.

The contestants receive makeovers before traveling to Washington, D.C., to meet Michelle Obama and debut their new looks to friends and family. Fashion pro Jeannie Mai and celebrity hairstylist Ken Paves assist with the transformations.

Michelle Obama discusses health and fitness with the six remaining players and meets with their families. She also joins the gang for a workout at the White House. Elsewhere, Bob counsels a player who turns to food for comfort; and Dolvett leads a last-chance workout in front of the Ulysses S. Grant Memorial.

Previous winners John Rhode, Olivia Ward and Patrick House return to take on a difficult obstacle course along with the players. Also: The contestant who loses the highest percentage of weight for the week wins an SUV; the trainers and players watch videos documenting their progress.

The stakes are higher than ever when all the eliminated contestants return to the ranch to compete in a fateful, four-part challenge.

The challenge winner will secure a coveted spot as a finalist, and the chance to compete for the $250,000 grand prize, along with the other two finalists revealed in last week’s episode. It’s a fight to the finish with each player fiercely determined to get back in the game in a competition that will put their speed, knowledge and endurance to the ultimate test. In the end, the third finalist of season 13 will be revealed.

The contestants from this season return for a special reunion and a chance to weigh in one last time - and show America how much weight they've all lost since beginning their weight-loss journeys. Those who have been eliminated will compete for the $100,000 "at home" prize. Then it's the moment viewers have been waiting for, when one of the three finalists will be named this season's "Biggest Loser" and win the coveted grand prize of $250,000!

Three kids and 15 adults begin their weight-loss journeys in the Season 14 premiere. Trainer Jillian Michaels also returns to the show.

The players push themselves during exercise sessions at outdoor gyms set up by the trainers; the adults receive health assessments; the NFL's Antonio Gates encourages the contestants during a football-theme challenge; and the kids take a fitness test.

The players take a trivia test focusing on childhood obesity, and the losers must spend hours in a room with junk food, soda and video games; Dr. Dolgoff visits Sunny, Lindsay and Biingo's homes to help improve their families' eating habits; and the contestants race through a bubble-gum pit during a challenge.

The contestants are on their own this week when trainers Bob, Jillian and Dolvett leave town to surprise kid participants Biingo, Lindsay and Sunny and their families with a visit to their hometowns. Some players struggle without their trainer, but others rise to the occasion, and an unexpected leader emerges. In honor of this week’s "Pay it Forward" theme, contestants run a 5K and money is donated to a local Boys and Girls Club, with the winning team earning $15,000 to split among themselves. The trainers plan special surprises for each kid in their hometown before returning to the ranch in time for last chance workouts, when Jillian has a run-in with a player on another trainer’s team. Later, the weigh-in brings welcome news to one player who has been struggling, before another player is sent home.

This week kicks off with the players returning from a workout, only to find that the kitchen and refrigerators are empty. Tasked with trying to affordably stock the kitchen with a week’s worth of healthy food, the contestants race against time to make healthy purchases within their budget at a grocery. Later, one contestant struggles to keep trying her best despite weight loss setbacks, while Dr. H and one of the trainers help a contestant realize the importance of addressing the emotional issues that contribute to weight gain. Trainers Bob, Jillian and Dolvett skype with kid participants Biingo, Lindsay and Sunny, and then a swimming challenge puts the players to the test as they compete for one of the most coveted prizes of all. Finally, a tearful elimination sends another player home.

It’s the halfway point in the season, and the contestants find out that the weight of only one player on each team will count this week, but they won’t know who it will be until the weigh-in. With this week’s theme of “Leading by example,” trainers Bob, Jillian and Dolvett skype with kid participants Biingo, Sunny and Lindsay, and motivate each one to do just that. While Sunny creates a circuit training routine for her fellow classmates, Biingo tries to recruit more friends to his after-school sports club. Lindsay gives an anti-bullying speech to her peers, joined by special guest Cody Simpson, who also talks about his experience being teased before performing for the kids. The adult contestants compete in a crazy challenge requiring them to avoid three swinging pendulums while walking on a balance beam to retrieve calorie-coded plates matching five specific dishes.

It’s halfway through the competition, and the remaining eight players go to singles this week. The contestants face their first temptation in honor of Valentine’s Day, featuring favorite Valentine’s Day treats and the promise of the winner getting a weigh-in-advantage for themselves and a friend. Meanwhile, the trainers continue to motivate the kid participants to stay active and work toward their goals at home. Jillian arranges for Sunny to take a Bollywood dance class, Dolvett motivates Lindsay to attend a cheerleading practice, and Biingo anxiously waits for news from the doctor about whether he’ll be able to start practicing for the youth baseball league tryouts that Bob set up for him. Back at the ranch, one player displays an amazing act of kindness, and another has an emotional, heart to heart talk with a trainer about the circumstances leading to his weight gain.

The players work together to lose 70 pounds in order to win immunity for all; the kid participants are tested in a pop challenge; a sand-digging challenge offers a weigh-in advantage; the trainers and players participate in a team-building exercise; Subway's Jared Fogle offers words of wisdom; and Jillian and the kids endorse Seventeen magazine's "Body Peace Treaty.

Two players leave the ranch during a week devoted to facing fears. Others confront fears that include sharks, confined spaces and singing in public. Also, a challenge atop a seven-story building is planned for the contestants. Elsewhere, Sunny has a difficult conversation with her mom; Lindsay learns about the daily life of a diabetic; and Biingo tries to eat vegetables.

The contestants receive makeovers, with fashion guidance from Tim Gunn and new hairstyles from Ken Paves. They then return home to reveal their new looks to friends and family. Meanwhile, the players aim to lose a certain percentage of body weight in order to win immunity for everyone.

Two finalists are named along with the two players who will compete for the third spot in the finale. Also: The contestants pull the weight they've lost up a mountain; the kids and the contestants receive health updates and reflect on their weight-loss journeys.

The winner of the $250,000 prize is crowned in the Season 14 finale, and the eliminated players return to weigh in for the $100,000 at-home prize.

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The teams learn that only one member's weigh-in will count for the week, and the representative is chosen by a roll of the die. Also: The players compete in a water-bucket race; a contestant receives a troubling health update; a player connects with a family member; and one of Season 14's child ambassadors revisits the show.

The contestants bid on gym equipment in an auction. Later, one player discusses her difficult childhood; the contestants contact their family members; and Season 12 contestant Vinny Hickerson makes an appearance.

The contestants must scavenge through a pumpkin patch in search of immunity, but temptations lurk around every corner.

Last season's kid ambassadors Biingo, Lindsay and Sunny return to the ranch and are joined by the White House Senior Policy Advisor on Nutrition, Sam Kass, for a fun cooking challenge with the contestants. Well aware that kids are often the toughest food critics, the red, white and blue teams race against the clock to prepare a nutritious and tasty dish that will be a hit with the kids - and earn the winning team members an incredible prize. Also this week, one team works out with a very special and inspiring group of women who have survived or are battling cancer. Later, it's time for the weigh-in and saying goodbye to another contestant

It's a busy week at "The Biggest Loser" ranch, which kicks off with a fun bouncing ball challenge that will award members of the winning team a welcome cash prize. All of the contestant take an emotional walk down memory lane watching their casting audition videos, reminding them why they are at the ranch -- and how far they've come in just six weeks. Ruben and Dolvett visit music icon and 16-time Grammy Award winner David Foster at his home, where Ruben isn't the only one stepping up to the microphone. And the show's most recent "Biggest Loser" winner, Danni Allen, stops by for lunch and a pep talk with the contestants. Then it's time for another tense weigh-in, where one more contestant will face elimination.

The contestants celebrate Thanksgiving week with a special challenge - racing to load boxes of Thanksgiving food into trucks headed to help tornado victims in Moore, Oklahoma, where one player has a special connection. Members of the winning team are very thankful for their prize - a holiday dinner shared at the ranch with loved ones flown in for the celebration. Emotional reunions follow, as the winning team, their trainer and their family members gather for a Thanksgiving feast and share what they are most grateful for. Also, one player gets encouragement from his trainer to talk to his family about a long-kept secret, and the show catches up with one of season 14's child ambassadors, Sunny, to see how she is doing today. Then it's time for weigh-in and another elimination, which leaves one trainer giving a very tearful and emotional farewell to one of their players.

Alison drops a bomb on the contestants: this week, another person will be going home. Before there's time to freak out, she informs them the one person chosen to go home will represent his or her entire team at next week's weigh-in and take the team trainer home for the week. A massive wheel with the contestants' faces on it is spun and the lucky/unlucky winner is... Jay from the White Team! Although Jillian is less than thrilled to go to Farmington, Missouri for the week, Jay is ecstatic to see his family again. He's greeted by a packed room of friends and family.

The contestants meet in a diner to answer questions about obesity, and the losing team must work in the eatery for a week. Meanwhile, a trainer helps one of the players work through personal obstacles; and a contestant's family get on a healthy track.

The teams are dissolved, and the 10 remaining players compete in an endurance challenge before a double elimination takes place. Meanwhile, the trainers work out with different contestants; and a player struggles with negative thoughts.

The eliminated contestants return to the ranch for a second chance to get back into the competition.

The contestants arrive in Park City, Utah to begin their week of training with Olympic athletes. They meet with Dolvett, who introduces them to eight-time Olympic speed skater Apollo Ohno. Apollo introduces the contestants to the Olympic training center and gives them a few tips on handling the psychological aspects of training.

The contestants meet with stylists Tim Gunn and Ken Paves to get new styles for their new looks.

The stakes are higher than ever when the five final players compete in a "Biggest Loser" first -- a sprint triathlon, requiring them to swim a mile, bike 12 miles and run three miles. The triathlon winner will secure a coveted spot as a finalist, as well as a brand new Ford Fusion. Then it's an emotional trip down memory lane as the contestants watch footage of their journeys with their trainers, and see firsthand how far they've come since arriving on the ranch. Later, it's time for the last weigh-in before the finale, where two players will fall below the red line and go home, and two more will become finalists, joining the triathlon winner to compete for $250,000 and the title of "The Biggest Loser" at the season 15 finale.

In this must-see, exciting live finale, the 15 contestants from this season return for a special reunion and a chance to weigh in one last time - and show America how much weight they've all lost since beginning their weight-loss journeys. Those who have been eliminated will compete for the $100,000 "at home" prize. Then it's the moment viewers have been waiting for, when one of the three finalists will be named this season's "Biggest Loser" and win the coveted grand prize of $250,000.

A new set of hopefuls are introduced for the first time.

The players compete on a assault course, challenging them to break through excuses that are getting in their way.

The contestants test their nutritional understanding before competing in an endurance challenge. Meanwhile, an inspirational "Wall of Glory" reminds them of their athletic days and provides motivation to work harder at the gym.

A lottery challenge takes place, in which one contestant is selected to go home with a trainer for the week—and the chosen person's weight will the only one that counts for the team's weigh-in. Meanwhile, the remaining contestants try to keep up with their plans at the ranch without their trainer; and two eliminated players compete at Comeback Canyon.

The teams are challenged to race through the air across a canyon and then solve a puzzle; and the winners get the chance to sideline one player from the losing team at weigh-in.

The contestants face a tailgating challenge, where they are tempted with high-calorie comfort foods. Later, a player discusses emotional issues with his trainer; and Bob receives a gift from a "Comeback Canyon" contestant.

In a pool challenge, the teams are tasked to hold a percentage of their body weight in order to keep their trainers from falling into a pool, and the last-place team loses its trainer for the week. Elsewhere, two eliminated contestants team up at Comeback Canyon; and one contestant gives her trainer a look at her past.

The players compete in a challenge involving water and giant treadmills, and the winning team gets a chance to penalize the two losing teams. Elsewhere, Bob Harper advises two Comeback Canyon contestants about setting priorities.

NFL stars Michael Irvin, Donald Driver and Willie McGinest visit the ranch, where they participate in a football challenge and offer the contestants training advice.

The ranch is rocked when the teams are dismantled and new teams are formed. Chef Rocco DiSpirito has to judge which team has managed to create the healthiest and tastiest dish.

A sandpile challenge is attempted as the players try to lose 50 pound collectively. Also: Players reflect on their accomplishments and communicate their goals while hiking with their trainers.

The teams disband and the players compete on their own for the first time in an obstacle course, with the grand prize being immunity. Later, the trainers surprise the players with videos featuring words of encouragement from loved ones

Part 1 of 2. The players head to Hawaii, where they participate in a kayak challenge. Later, a trainer and a player who both fear the open water try snorkeling.

Conclusion. Contestants face their fears in Hawaii. Included: One player tries rappelling down a waterfall, and another goes rope-swinging through the jungle. Later, the contestants use coconuts to tackle a lacrosse-inspired obstacle course.

We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.

It's down to the final four - Rob, Sonya, Woody and Toma - and after 17 weeks, someone's dream of becoming a finalist comes to an end.

The contestants walk into the gym to see Jenna Wolfe, the lifestyle and fitness correspondent for the Today Show. Despite being seven months pregnant, Jenna shows the players how to work out without a gym. At the same time, Bob Harper gives the other trainers a workout of a lifetime.

Contestants from this season reunite and reveal how much weight they've lost; the at-home winner is revealed; the grand-prize winner is announced.

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Contestants go to a food court and field trivia questions about unhealthy food before visiting a medical research facility. Later, they pull food trucks, and the winners get tips from Lorenza Garcia while the losing team must eat from the food trucks.

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An auction is held and contestants win top-notch prizes, including a solo workout with Bob Harper. Later, one team win a day of relaxation on a yacht, which they can trade for exclusive gym access.

One contestant sends two others home for a week in the first half of this combined episode. In the second half, all the players leave the ranch for a week to see how they face daily real-world challenges.

It's one of the most eagerly anticipated events of 'The Biggest Loser' season - the fan-favorite makeover episode! Fashion expert Tim Gunn and celebrity hair stylist Ken Paves return to create amazing and inspirational transformations with the remaining seven contestants. And though they still have to stick to their weight-loss routines, there will be no temptation this week. After getting a brand new look from head to toe, the players get to show off their new slimmer selves to loved ones flown in to celebrate their big day. Later, they learn they're competing in a Last Chance Challenge with one of their loved ones for an advantage at this week's weigh in.

With only two weeks left on the ranch, Bob welcomes the contestants at a challenge that will tempt the winner with a prize that could change the course of the entire competition. Not only will they win a one-pound advantage for themselves, they'll gain the ultimate power in the game with the ability to give a one-pound disadvantage to one of their remaining opponents. THE FINAL CUT The five remaining players gather for their final challenge, a time-honored tradition of contestants putting back on all the weight they've lost over the course of the season and then shedding it one last time at different stages. The winner receives a coveted prize that could secure their spot as a finalist as the competition goes from five players to three, before next week's live finale when the Biggest Loser and winner of the $250,000 prize will be chosen.

In this must-see live finale, the 16 contestants from this season return for a special reunion and a chance to weigh in one last time and show America how much weight they've lost since beginning their weight-loss journeys. Those who have been eliminated will compete for the $100,000 "at home" prize. Then it's the moment viewers have been waiting for, when one of the three finalists will be named this season's "Biggest Loser" and win the coveted grand prize of $250,000.