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 5 They Got Fat Together, Can They Get Thin Together?
- Season 5 Contestants Face Barbecue Temptation and Giant Seesaw Challenge!
- Season 5 Tensions Run High As This Week's Challenge Causes Rifts Among Players
- Season 5 One Outcast Duo Squares Off Against All the Rest
- Season 5 Surprise Escalator Challenge Changes the Game Forever
- Season 5 Celebrity Chef Rocco DiSpirito Guest Stars
- Season 5 Special Guest Appearance by Jillian's Mom
- Season 5 Contestants Reunited With Loved Ones
- Season 5 One Team Surprised With Trip to Vegas
- Season 5 Contestants Tackle One of the Biggest Challenges in Show's History
- Season 5 All Contestants Return to Ranch in Surprise Twist
- Season 5 Contestants Made Over by Fashion Guru Tim Gunn
- Season 5 Competition Heats Up With Only Six Contestants Left
- Season 5 Last Five Contestants Get Surprise Trip to Australia
- Season 5 Surprise Game-Changing Twist in Last Episode Before Live Finale
- Season 5 "Biggest Loser" Revealed in Season Finale
The Biggest Loser - Season 5 Episode 1 They Got Fat Together, Can They Get Thin Together?
5.50 90 minutes For the first time ever, ten teams of two will compete against each other. The ten teams, including a mother and son, husband and wife, best friends, brothers, and a divorced couple, will have to pick their trainer, compete in challenges and weigh-in together. In their first week, the teams will have to pull a giant hot air balloon across a field, and the winner will receive a two-pound advantage at the weigh-in.
