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In this competition series, overweight contestants battle it out to see who can lose the most weight. The series is marked by regular challenges and emotional backstories as the contestants are guided through their weight loss by professional trainers. At the end of each season, the biggest loser gets a big cash prize.

The Biggest Loser is a series that is currently running and has 18 seasons (283 episodes). The series first aired on October 19, 2004.

Where do I stream The Biggest Loser online? The Biggest Loser is available for streaming on NBC, both individual episodes and full seasons. You can also watch The Biggest Loser on demand at Amazon, Vudu, USA, Microsoft Movies & TV, Google Play, iTunes online.

18 Seasons, 283 Episodes
October 19, 2004
Game Show, Reality
Cast: Bob Harper, Jillian Michaels, Kim Lyons, Cara Castronuova, Brett Hoebel
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Clips & Extras

The Biggest Loser Full Episode Guide

  • All twelve contestants return to campus where they began their journey to see how far they've come.

  • The final four contestants revisit a fitness milestone to see how much progress they have made.

  • The contestants get the encouragement they need to keep moving forward on their journey.

  • It's everyone for themselves as the players no longer compete in teams.

  • One contestant faces an unexpected obstacle, forcing their team to come together in new ways.

  • The contestants take a dive into fitness as friendships grow stronger.

  • All the remaining contestants finally get to reconnect with friends and family.

  • Two contestants overcome their insecurities and emerge as leaders during this week's challenge.

  • A loss by one team causes emotions to run high as the contestants push harder to meet their goals.

  • A loss by one team causes emotions to run high as the contestants push harder to meet their goals.

  • 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.

  • The winner of the $250,000 prize is announced in the Season 17 live finale, and the eliminated contestants come back to weigh in for the $100,000 at-home prize.

  • With only two weeks remaining at the ranch, the contestants with compete in a challenge that will tempt the winner with a prize that could change the course of the entire competition. / The five remaining players gather for the traditional experience of putting on all the weight they've lost over the course of the season and then shedding it one last time at different stages.

  • It's time for the much anticipated makeover week with special guests Tim Gunn and hair stylist Ken Paves.

  • One competitor sends two others back home for one week, and those two run into a number of temptations. / Each of the contestants go away from the ranch for one week for a trial to test how they will react to real-life challenges concerning eating and exercising.

  • Contestants get a chance at winning great prizes at an auction. / A team earns either a relaxing day on a yacht or exclusive gym access.

  • Participants compete in an obstacle course involving digital distractions, and the winners have a hard choice to make involving video chats with their closest family and friends. / The teams are divided and new connections have to be made to complete a physical and mental challenge.

  • In the season premiere, sixteen people fight to start their path to weight-loss. Featuring: Bob Harper as the new host, the unveiling of a new gym and bringing to light a new temptation.

The Biggest Loser News

Subway Jared Faces Federal Child Porn Raid

The Feds raided the sandwich spokesman's house in an ongoing child pornography investigation.

Jillian Michaels Dropping Out of 'Biggest Loser'

"The Biggest Loser" is about to shed another 120 or so pounds...and they all belong to Jillian Michaels. The weight loss competition show's most famous trainer will not be back for the upcoming season. According to a statement from NBC: "After helping hundreds of contestants transform their lives and inspiring millions of viewers at home, 'The Biggest Loser' and Jillian Michaels have decided to part ways and she will not be returning for season 16 when it airs in the fall.

'Biggest Loser's' Rachel Fredricksen Wins Amid Eating Disorder Controversy - See Her Dramatic Transformation

Shock and awe over the weight loss of the reality competition show's contestants isn't anything new for a "Biggest Loser" finale, but last night's episode was more shocking than usual. Rachel Fredricksen, a 22-year-old contestant on the show, was an increasing favorite to win as the season went on. By the time the second to last episode aired, her victory was all but assured.

'The Biggest Loser' Contestants Threaten To Quit

If this proves true, then "The Biggest Loser" producers deserve feeling shameful for playing games with people trying to change their lives for the better. CBS News reports today by way of TMZ that that long-running NBC weight-loss reality show's Season 13 contestants may quit the show before season's end after walking completely off the competition. NBC hasn't yet addressed this rumor, but producers allegedly planned luring back past competitors to compete against remaining contestants for this season's $250,000 cash prize.

Who's the Biggest Loser? No, Not Kim Kardashian

Say what you will about reality TV and how bad it is for society, but for at least one man, "The Biggest Loser" made a huge positive difference in his life. It came down to three final contestants in last night's season finale of the NBC show, and while all of them ultimately won, only one could take home $250,000.

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The Biggest Loser Video Clips & Extras

The Biggest Loser Trailer (00:34) The First Workout - The Biggest Loser Highlight Clip (01:40) Choosing Teams - The Biggest Loser Highlight Clip (02:40) The First Weigh-in and Trainer Save - The Biggest Loser Highlight Clip (03:13) Jillian Talks Season 15 - The Biggest Loser Clip (04:11) The Tale of Bob and Jeff - The Biggest Loser Highlight Clip (03:31)