Season
- 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 4 Back to Basics
- Season 4 The Secret Black Team is Revealed!
- Season 4 The Pressure of Temptation
- Season 4 Bidding Wars
- Season 4 Surprise Getaway
- Season 4 Lively Beach Competition
- Season 4 Weigh-In Shocker
- Season 4 Most Emotional Elimination So Far of the Season
- Season 4 Biggest Losers Go Green
- Season 4 A Taste of Home
- Season 4 Memorable Makeovers
- Season 4 Viewers Choose the Challenge
- Season 4 A Slice of Temptation
- Season 4 Five Remaining Players Compete for Spot on Finale
- Season 4 "Biggest Loser" Revealed in Season Finale!
The Biggest Loser - Season 4
5.40 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.
