

Seasons and episodes
18
Season 18 January 28, 2020
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18 - 1Time for Change January 28, 2020
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18 - 2A Big Loss February 04, 2020
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18 - 3Supporting the Team February 11, 2020
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18 - 4Messages from Home February 18, 2020
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18 - 5Diving In February 25, 2020
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18 - 6Overcoming Obstacles February 27, 2020
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18 - 7Going Solo March 10, 2020
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18 - 8Boosting Morale March 17, 2020
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18 - 9Final Four March 24, 2020
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18 - 10Finale March 31, 2020
17
Season 17 January 04, 2016
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17 - 1Money Hungry January 04, 2016
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17 - 2Taste Test / Keep On Truckin' January 11, 2016
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17 - 3Hooked On 'Tronics / The Big Switch January 18, 2016
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17 - 4Ready? Set. Auction!; Ship Shape January 25, 2016
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17 - 5Homeward Bound/Real World Problems February 01, 2016
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17 - 6Makeover Week February 08, 2016
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17 - 7I Got The Power/The Final Cut February 15, 2016
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17 - 8Live Finale February 22, 2016
16
Season 16 September 11, 2014
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16 - 1Opening Day September 11, 2014
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16 - 2The Knockout September 18, 2014
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16 - 3Double Header September 25, 2014
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16 - 4The Lottery October 02, 2014
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16 - 5Sidelined October 09, 2014
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16 - 6The Tailgate October 16, 2014
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16 - 7The Drop October 23, 2014
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16 - 8Penalty Box October 30, 2014
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16 - 9Yes, Coach! November 06, 2014
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16 - 10Free Agents November 13, 2014
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16 - 11No "I" in Team November 20, 2014
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16 - 12The Playoffs December 11, 2014
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16 - 13Kauai Part 1 December 18, 2014
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16 - 14Kauai Part 2 January 01, 2015
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16 - 15Makeover Week January 08, 2015
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16 - 16The Comeback January 15, 2015
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16 - 17End Zone January 22, 2015
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16 - 18Live Finale January 29, 2015
15
Season 15 October 08, 2013
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15 - 1The Biggest Loser Season 15 Episode 1 October 08, 2013
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15 - 2A Game of Chance October 22, 2013
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15 - 3The Auction October 29, 2013
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15 - 4Trick or Treat November 05, 2013
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15 - 5The Cook-Off November 12, 2013
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15 - 6Episode 6 November 19, 2013
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15 - 7Thanksgiving November 26, 2013
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15 - 8Take a Trainer Home December 03, 2013
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15 - 9Workplace Obesity December 10, 2013
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15 - 10Episode 10 December 17, 2013
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15 - 11Who Gets a Second Chance Back? January 07, 2014
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15 - 12Winter Olympics January 14, 2014
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15 - 13Makeover Week January 21, 2014
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15 - 14Triathlon January 28, 2014
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15 - 15Finale February 04, 2014
14
Season 14 January 06, 2013
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14 - 1We're Back ... And So Is Jillian January 06, 2013
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14 - 2Keep Moving January 07, 2013
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14 - 3Cut the Junk January 14, 2013
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14 - 4Pay It Forward January 21, 2013
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14 - 5Waist & Money January 28, 2013
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14 - 6Lead by Example February 04, 2013
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14 - 7Tough Love February 11, 2013
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14 - 8Work Together February 18, 2013
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14 - 9Face Your Fears February 25, 2013
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14 - 10Make a Difference (Makeover Week) March 04, 2013
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14 - 11Down to the Wire March 11, 2013
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14 - 12Live Finale March 18, 2013
13
Season 13 January 03, 2012
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13 - 1Week 1 January 03, 2012
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13 - 2Week 2 January 10, 2012
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13 - 3Week 3 January 17, 2012
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13 - 4Week 4 January 24, 2012
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13 - 5Week 5 January 31, 2012
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13 - 6Week 6 February 07, 2012
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13 - 7Week 7 February 14, 2012
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13 - 8Week 8 February 21, 2012
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13 - 9Week 9 February 28, 2012
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13 - 10Week 10 March 06, 2012
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13 - 11Week 11 March 13, 2012
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13 - 12Week 12 March 20, 2012
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13 - 13Week 13 March 27, 2012
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13 - 14Week 14 April 03, 2012
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13 - 15Week 15 April 10, 2012
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13 - 16Week 16 April 17, 2012
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13 - 17Week 17 April 24, 2012
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13 - 18Week 18 - Finale May 01, 2012
12
Season 12 September 20, 2011
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12 - 1Week 1 September 20, 2011
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12 - 2Week 2 September 27, 2011
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12 - 3Week 3 October 04, 2011
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12 - 4Week 4 October 11, 2011
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12 - 5Week 5 October 18, 2011
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12 - 6Week 6 October 25, 2011
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12 - 7Week 7 November 01, 2011
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12 - 8Week 8 November 08, 2011
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12 - 9Week 9 November 15, 2011
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12 - 10Week 10 November 22, 2011
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12 - 11Week 11 - Makeover Week November 29, 2011
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12 - 12Week 12 December 06, 2011
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12 - 13Week 13 - Finale December 13, 2011
11
Season 11 January 04, 2011
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11 - 1Week 1 January 04, 2011
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11 - 2Week 2 January 11, 2011
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11 - 3Week 3 January 18, 2011
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11 - 4Week 4 January 25, 2011
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11 - 5Week 5 February 01, 2011
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11 - 6Week 6 February 08, 2011
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11 - 7Week 7 February 15, 2011
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11 - 8Week 8 February 22, 2011
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11 - 9Week 9 March 01, 2011
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11 - 10Week 10 March 08, 2011
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11 - 11Week 11 March 15, 2011
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11 - 12Week 12 March 22, 2011
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11 - 13Week 13 March 29, 2011
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11 - 14Week 14 April 05, 2011
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11 - 15Week 15 April 12, 2011
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11 - 16Week 16 April 19, 2011
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11 - 17Week 17 April 26, 2011
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11 - 18Week 18 “Makeover Week” May 03, 2011
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11 - 19Week 19 May 10, 2011
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11 - 20Week 20 May 17, 2011
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11 - 21Week 21 May 24, 2011
10
Season 10 September 21, 2010
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10 - 1Week 1 September 21, 2010
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10 - 2Week 2 September 28, 2010
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10 - 3Week 3 October 05, 2010
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10 - 4Week 4 October 12, 2010
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10 - 5Week 5 October 19, 2010
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10 - 6Week 6 October 26, 2010
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10 - 7Week 7 November 02, 2010
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10 - 8Week 8 November 09, 2010
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10 - 9Week 9 November 16, 2010
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10 - 10Week 10 November 23, 2010
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10 - 11Week 11 November 30, 2010
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10 - 12Week 12 December 07, 2010
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10 - 13Week 13 December 14, 2010
9
Season 9 January 05, 2010
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9 - 1Week One January 05, 2010
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9 - 2The Biggest Loser Season 9 - Week Two January 12, 2010
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9 - 3Week 3 January 19, 2010
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9 - 4Season 9, Episode 4 January 26, 2010
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9 - 5Season 9, Episode 5 February 02, 2010
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9 - 6Season 9, Episode 6 February 09, 2010
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9 - 7Season 9, Episode 7 March 02, 2010
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9 - 8Season 9, Episode 8 March 09, 2010
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9 - 9Season 9, Episode 9 March 16, 2010
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9 - 10Week 10 March 23, 2010
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9 - 11Season 9, Episode 11 March 30, 2010
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9 - 12Week 12 April 06, 2010
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9 - 13Season 9, Episode 13 April 13, 2010
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9 - 14Season 9, Episode 14 April 20, 2010
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9 - 15Season 9, Episode 15 April 27, 2010
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9 - 16Season 9, Episode 16 May 04, 2010
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9 - 17Season 9, Episode 17 May 11, 2010
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9 - 18Season 9, Episode 18 May 18, 2010
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9 - 19Season 9 Finale May 25, 2010
8
Season 8 September 15, 2009
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8 - 1Week 1 September 15, 2009
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8 - 2The Biggest Loser: Couples Season 8 Episode 2 September 22, 2009
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8 - 3Week 3 September 29, 2009
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8 - 4Week 4 October 06, 2009
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8 - 5Season 8, Episode 5 October 13, 2009
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8 - 6Week 6 October 20, 2009
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8 - 7Week Seven October 27, 2009
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8 - 8Week Eight November 03, 2009
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8 - 9Week 9 November 10, 2009
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8 - 10Week 10 November 17, 2009
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8 - 11Week 11 November 24, 2009
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8 - 12Week 12 December 01, 2009
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8 - 13Season 8 Finale December 08, 2009
7
Season 7 January 06, 2009
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7 - 1Season Premiere January 06, 2009
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7 - 2Bob goes angry January 13, 2009
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7 - 3Temptations suck January 20, 2009
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7 - 4Super Bowl January 27, 2009
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7 - 5Home Team Weigh-In February 03, 2009
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7 - 6The Biggest Loser Season 7 Episode 6 February 10, 2009
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7 - 7Gym Keys February 17, 2009
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7 - 8Black and Blue Part 1 February 24, 2009
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7 - 9Black and Blue Part 2 February 25, 2009
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7 - 10Chef Rocco DiSpirito March 03, 2009
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7 - 1124 Hour Fitness Relay Race March 10, 2009
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7 - 12Contestants Go Home for a Week and Complete Half-Marathons March 17, 2009
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7 - 13The Teams Split Up March 24, 2009
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7 - 14Blast from the Past March 31, 2009
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7 - 15Only One Vote April 07, 2009
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7 - 16The Makeover Episode April 14, 2009
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7 - 17Trivia Quiz April 21, 2009
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7 - 18Contestants Get to Train Their Trainers! April 28, 2009
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7 - 19Running a Full Marathon! May 05, 2009
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7 - 20Finale May 12, 2009
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7 - 21Finale Part 2 May 12, 2009
6
Season 6 September 16, 2008
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6 - 1Husband-Wife and Parent-Child Teams September 16, 2008
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6 - 2Chef Rocco DiSpirito September 23, 2008
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6 - 3Grand Canyon September 30, 2008
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6 - 4Toughest Challenge Yet October 07, 2008
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6 - 5Surprising Weigh-In October 08, 2008
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6 - 6Longest Challenge Ever October 14, 2008
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6 - 7Unusual Workouts October 21, 2008
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6 - 8Record-Breaking Weigh-In October 28, 2008
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6 - 9Week of Surprises November 11, 2008
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6 - 10'80s Week November 18, 2008
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6 - 11Thanksgiving week November 25, 2008
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6 - 12Makeover Episode December 02, 2008
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6 - 13Final Four December 09, 2008
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6 - 14Finale! December 16, 2008
5
Season 5 January 01, 2008
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5 - 1They Got Fat Together, Can They Get Thin Together? January 01, 2008
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5 - 2Contestants Face Barbecue Temptation and Giant Seesaw Challenge! January 08, 2008
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5 - 3
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5 - 4One Outcast Duo Squares Off Against All the Rest January 22, 2008
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5 - 5Surprise Escalator Challenge Changes the Game Forever January 29, 2008
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5 - 6Celebrity Chef Rocco DiSpirito Guest Stars February 05, 2008
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5 - 7Special Guest Appearance by Jillian's Mom February 12, 2008
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5 - 8Contestants Reunited With Loved Ones February 19, 2008
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5 - 9One Team Surprised With Trip to Vegas February 26, 2008
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5 - 10
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5 - 11All Contestants Return to Ranch in Surprise Twist March 11, 2008
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5 - 12Contestants Made Over by Fashion Guru Tim Gunn March 18, 2008
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5 - 13Competition Heats Up With Only Six Contestants Left March 25, 2008
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5 - 14Last Five Contestants Get Surprise Trip to Australia April 01, 2008
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5 - 15
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5 - 16"Biggest Loser" Revealed in Season Finale April 15, 2008
4
Season 4 September 11, 2007
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4 - 1Back to Basics September 11, 2007
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4 - 2The Secret Black Team is Revealed! September 18, 2007
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4 - 3The Pressure of Temptation September 25, 2007
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4 - 4Bidding Wars October 02, 2007
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4 - 5Surprise Getaway October 09, 2007
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4 - 6Lively Beach Competition October 16, 2007
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4 - 7Weigh-In Shocker October 23, 2007
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4 - 8Most Emotional Elimination So Far of the Season October 30, 2007
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4 - 9Biggest Losers Go Green November 06, 2007
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4 - 10A Taste of Home November 13, 2007
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4 - 11Memorable Makeovers November 20, 2007
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4 - 12Viewers Choose the Challenge November 27, 2007
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4 - 13A Slice of Temptation December 04, 2007
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4 - 14Five Remaining Players Compete for Spot on Finale December 11, 2007
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4 - 15"Biggest Loser" Revealed in Season Finale! December 18, 2007
3
Season 3 September 20, 2006
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3 - 1Season Premiere September 20, 2006
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3 - 2The Biggest Loser Goes to the Beach September 27, 2006
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3 - 3Cruise Week October 04, 2006
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3 - 4Free Pass October 11, 2006
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3 - 5Gym Gone October 18, 2006
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3 - 6Tough Choices October 25, 2006
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3 - 7Duos November 01, 2006
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3 - 8They're Back November 08, 2006
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3 - 9Individuals November 15, 2006
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3 - 10All About the Holidays November 29, 2006
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3 - 11Back to School December 06, 2006
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3 - 12The Final Four December 06, 2006
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3 - 13Season Finale Live! December 13, 2006
2
Season 2 September 13, 2005
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2 - 1Season Two Begins September 13, 2005
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2 - 2Straight and Narrow is Tough September 20, 2005
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2 - 3Hurt Bodies and Feelings September 27, 2005
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2 - 4What Happens in Vegas Buffets in Vegas October 04, 2005
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2 - 5Losing Teammates Instead of Weight Drags Down One Team October 11, 2005
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2 - 6High Anxiety October 18, 2005
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2 - 7Let's Do the Twist! October 25, 2005
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2 - 8Fancy Footwork from Pedicures to Pedicabs November 01, 2005
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2 - 9Jump Start November 08, 2005
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2 - 10Last One in the Pool is a Winner November 15, 2005
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2 - 11Scary Scale November 22, 2005
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2 - 12Season Two Finale November 29, 2005
1
Season 1 October 19, 2004
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1 - 1Episode 1: Pilot October 19, 2004
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1 - 2Episode 2 October 26, 2004
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1 - 3Episode 3 November 09, 2004
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1 - 4Episode 4: Red and Blue Teams Go to New Heights November 16, 2004
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1 - 5Episode 5: A Team Lightens Up Through Elimination November 23, 2004
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1 - 6Episode 6: Teams Trek to the Beach for a Challenge November 30, 2004
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1 - 7Episode 7: Biking Challenge December 07, 2004
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1 - 8Episode 8: Playing It Close to the Vest December 14, 2004
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1 - 9Episode 9: A Look Back Special December 21, 2004
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1 - 10Episode 10: Final Weigh-In At The Ranch January 04, 2005
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1 - 11Episode 11: Season Finale January 11, 2005
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1 - 12Episode 12: It Isn't Over Until It's Over January 18, 2005
Overview
The Biggest Loser features obese people competing to win a cash prize by losing the highest percentage of weight relative to their initial weight.