As of July 2026, The Biggest Loser Season 5 aired in 2008 with 16 episodes — streaming now on Amazon Prime Video. Full episode guide and where to watch below.
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The Biggest Loser Season 5

2008 16 Episodes Reality ⭐ 5/10

Right now you can watch The Biggest Loser Season 5 on and — and it is more addictive than the premise lets on. Across 1 season, the show has had time to find its rhythm and keep it. A 5/10 rating says what the writing already makes obvious: this one works. Bob Harper anchors the format, but the whole cast makes it watchable. There is no real reason to keep putting it off.

There is a reason The Biggest Loser Season 5 keeps coming up in conversation. The Biggest Loser Season 5 has the format that countless others have tried to copy since. The Biggest Loser: Couples is the fifth season of the NBC reality television series The Biggest Loser. The fifth season premiered on January 1, 2008 with ten overweight couples competing for a cash prize of $250,000. This season featured Alison Sweeney as the host, with trainers Bob Harper and Jillian Michaels; all three returning from season four. Bob Harper and Alison Sweeney lead a cast that brings real weight to the material. It was aired in 2008. What keeps The Biggest Loser Season 5 from feeling stale is a production that knows when to get out of the way. It delivers reliably on what it promises, which is more than most of its competition manages.

If the format appeals to you at all, The Biggest Loser Season 5 is one of the stronger examples of it. It has built its own audience without needing a direct comparison. It is a manageable watch, easy to fit into a single week. The production understands its own premise and executes on it without apology. If you have enjoyed similar formats before, this is one of the stronger examples of what the genre can do.

📡 Where to Watch The Biggest Loser Season 5

🇦🇺 Australia
🇺🇸 United States
🇬🇧 United Kingdom
🇨🇦 Canada
🇳🇿 New Zealand
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🎬 The Biggest Loser Season 5 — Episode Guide

E1
They Got Fat Together, Can They Get Thin Together?
2008-01-01
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 hav...
E2
Contestants Face Barbecue Temptation and Giant Seesaw Challenge!
2008-01-08
The remaining nine teams are shocked to learn that Bob and Jillian will be training them all together as one team. Afterwards, the contestants will be tempted with a delicious barbecue buffet, and the challenges continue to get harder when they are tasked with riding giant seesaws.
E3
Tensions Run High As This Week's Challenge Causes Rifts Among Players
2008-01-15
A game of "Elimination," where the last team standing wins immunity for the week, causes rifts in the house, as the remaining eight teams get more competitive with each other. But Bob and Jillian are determined to work their teams harder in order to post more impressive numbers on the big scale at t...
E4
One Outcast Duo Squares Off Against All the Rest
2008-01-22
It's win or go home after a surprise elimination pits one outcast duo against all of the others. At the challenge, contestants compete for a prize they all desperately need after nearly a month away from their loved ones - letters from home. Three teams plot to throw the weigh-in, then have a change...
E5
Surprise Escalator Challenge Changes the Game Forever
2008-01-29
In this week's episode, one team retaliates after being called lazy by another team, and the willpower of the contestants is put to the test during a soda temptation. Then the game is changed forever - for trainers and contestants - after a dramatic escalator challenge.
E6
Celebrity Chef Rocco DiSpirito Guest Stars
2008-02-05
This week, the teams compete in a lively cook-off challenge, with celebrity chef Rocco DiSpirito as the judge. The winning team gets a special dinner prepared by Rocco, plus a very desirable "surprise" from home. Also, one team faces a setback when one of their strongest players suffers an injury, a...
E7
Special Guest Appearance by Jillian's Mom
2008-02-12
It's nearly the halfway point of the season, so the contestants celebrate the occasion with a challenge involving the total of their weight lost to date. Plus, they receive an inspirational visit from their doctor to assess their health advances. There's also a surprise guest trainer - Jillian Micha...
E8
Contestants Reunited With Loved Ones
2008-02-19
This week, the remaining contestants are sent home to see their loved ones for the first time since leaving to come to the ranch. But this is no vacation, as the contestants must eat and exercise without the help of their trainers and with all of the distractions and temptations of the real world. A...
E9
One Team Surprised With Trip to Vegas
2008-02-26
The competition heats up as only eight players remain. One team is surprised with a special trip to Las Vegas, but will they maintain their diets and workouts in Sin City, or give in to temptation? Then, in a very emotional elimination, one unsuspecting player makes the ultimate sacrifice for their ...
E10
Contestants Tackle One of the Biggest Challenges in Show's History
2008-03-04
After revisiting the hospital to check in on their progress, the remaining players face off in one of the biggest challenges in "Biggest Loser" history -- they must fly across a ravine on zip-lines and collect flags. One player gets the chance to give immunity to himself or one of his teammates, and...
E11
All Contestants Return to Ranch in Surprise Twist
2008-03-11
It's down to the six final contestants, but not for long. In a shocking twist, all fourteen of the players eliminated so far return to the ranch and surprise the six. At the weigh-in, the scale reveals how the eliminated contestants have done on their own at home, and the man and woman who have lost...
E12
Contestants Made Over by Fashion Guru Tim Gunn
2008-03-18
It's makeover week, and legendary fashion maven Tim Gunn helps the contestants find flattering new clothing styles and haircuts. Then in this week's challenge, players must walk backwards on treadmills suspended above water - and two contestants battle it out for more than an hour.
E13
Competition Heats Up With Only Six Contestants Left
2008-03-25
Only six players are left, and the remaining women try to hold their own against the men who are still in the game. In a surprising pop quiz, one player wins a mysterious prize. And at this week's challenge, the players get the chance to sabotage one another by giving each other calories.
E14
Last Five Contestants Get Surprise Trip to Australia
2008-04-01
Since The Biggest Loser is a global phenomenon, the last five players are surprised with a trip to the other side of the globe - Australia! Once there, they get a visit from The Biggest Loser: Australia winner, Adro, compete in a race around the city of Sydney, and climb the legendary Sydney Harbor ...
E15
Surprise Game-Changing Twist in Last Episode Before Live Finale
2008-04-08
In the last episode before the live finale, the final four contestants return from Australia without their trainers and attempt to train themselves for their last week on the ranch. Celebrity Chef Rocco DiSpirito visits again to teach the contestants how to make healthy versions of their favorite di...
E16
"Biggest Loser" Revealed in Season Finale
2008-04-15
In this must-see, exciting live finale, all of The Biggest Loser contestants from this season return for a special reunion and a chance to weigh in one last time and show America how much weight they've all lost since beginning their weight-loss journeys. There are four contestants left, but America...

🎭 Cast of The Biggest Loser Season 5

Bob Harper
Bob Harper
Self
Alison Sweeney
Alison Sweeney
Self - Host
Jillian Michaels
Jillian Michaels
Self

📋 All Seasons of The Biggest Loser

Season 1Season 2Season 3Season 4Season 6Season 7Season 8Season 9

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