The biggest winner is "The Biggest Loser" in this compelling new weight-loss reality drama in which two celebrity fitness trainers join with top health experts to help 12 overweight contestants transform their bodies, health and ultimately, their lives. Caroline Rhea hosts the unscripted, one-hour series in which two competing teams follow comprehensive diet and exercise plans to undergo radical physical makeovers. Unique physical challenges, surprising alliances and irresistible temptations make the competition even tougher for the contestants, who ultimately have to decide which player gets eliminated each week. In the end, "The Biggest Loser" becomes the biggest winner, walking away with a healthier body - and $250,000.
| Season | From | To | Episodes |
|---|---|---|---|
| All Seasons | |||
| Specials | September 2007 | November 2011 | 5 |
| Season 1 | October 2004 | January 2005 | 12 |
| Season 2 | September 2005 | November 2005 | 12 |
| Season 3 | September 2006 | December 2006 | 13 |
| Season 4 | September 2007 | December 2007 | 15 |
| Season 5 | January 2008 | April 2008 | 16 |
| Season 6 | September 2008 | December 2008 | 14 |
| Season 7 | January 2009 | May 2009 | 21 |
| Season 8 | September 2009 | December 2009 | 13 |
| Season 9 | January 2010 | May 2010 | 19 |
| Season 10 | September 2010 | December 2010 | 13 |
| Season 11 | January 2011 | May 2011 | 21 |
| Season 12 | September 2011 | December 2011 | 13 |
| Season 13 | January 2012 | May 2012 | 18 |
| Season 14 | January 2013 | March 2013 | 12 |
| Season 15 | October 2013 | February 2014 | 15 |
| Season 16 | September 2014 | January 2015 | 18 |
| Season 17 | January 2016 | February 2016 | 8 |
| Season 18 | January 2020 | March 2020 | 10 |
| Unassigned Episodes | 0 |
| Name | Number of Episodes | Dates | |
|---|---|---|---|
| Alison Sweeney | N/A |
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