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- Season 0 2007-09-04
- Season 1 2004-10-19
- Season 2 2005-09-13
- Season 3 2006-09-20
- Season 4 2007-09-11
- Season 5 2008-01-01
- Season 6 2008-09-16
- Season 7 2009-01-06
- Season 8 2009-09-15
- Season 9 2010-01-05
- Season 10 2010-09-21
- Season 11 2011-01-04
- Season 12 2011-09-20
- Season 13 2012-01-03
- Season 14 2013-01-06
- Season 15 2013-10-08
- Season 16 2014-09-11
- Season 17 2016-01-04
- Season 18 2020-01-28
Season 18 Episode
- Season 15 The Biggest Loser Season 15 Episode 1
- Season 15 A Game of Chance
- Season 15 The Auction
- Season 15 Trick or Treat
- Season 15 The Cook-Off
- Season 15 Episode 6
- Season 15 Thanksgiving
- Season 15 Take a Trainer Home
- Season 15 Workplace Obesity
- Season 15 Episode 10
- Season 15 Who Gets a Second Chance Back?
- Season 15 Winter Olympics
- Season 15 Makeover Week
- Season 15 Triathlon
- Season 15 Finale
The Biggest Loser - Season 15
5.46 90 minutes The Biggest Loser features obese people competing to win a cash prize by losing the highest percentage of weight relative to their initial weight.
