Season
- Season 18 2020-01-28
- Season 17 2016-01-04
- Season 16 2014-09-11
- Season 15 2013-10-08
- Season 14 2013-01-06
- Season 13 2012-01-03
- Season 12 2011-09-20
- Season 11 2011-01-04
- Season 10 2010-09-21
- Season 9 2010-01-05
- Season 8 2009-09-15
- Season 7 2009-01-06
- Season 6 2008-09-16
- Season 5 2008-01-01
- Season 4 2007-09-11
- Season 3 2006-09-20
- Season 2 2005-09-13
- Season 1 2004-10-19
- Season 0 2007-09-04
Episode
- Episode 1: Week One
- Episode 2: The Biggest Loser Season 9 - Week Two
- Episode 3: Week 3
- Episode 4: Season 9, Episode 4
- Episode 5: Season 9, Episode 5
- Episode 6: Season 9, Episode 6
- Episode 7: Season 9, Episode 7
- Episode 8: Season 9, Episode 8
- Episode 9: Season 9, Episode 9
- Episode 10: Week 10
- Episode 11: Season 9, Episode 11
- Episode 12: Week 12
- Episode 13: Season 9, Episode 13
- Episode 14: Season 9, Episode 14
- Episode 15: Season 9, Episode 15
- Episode 16: Season 9, Episode 16
- Episode 17: Season 9, Episode 17
- Episode 18: Season 9, Episode 18
- Episode 19: Season 9 Finale
The Biggest Loser Season 9 Season 9, Episode 7
The Biggest Loser features obese people competing to win a cash prize by losing the highest percentage of weight relative to their initial weight.
