As of June 2026, The Biggest Loser is a Reality series that aired since 2004 with 18 seasons — streaming now on Amazon Prime Video. Find out where to watch it below.
The Biggest Loser poster

The Biggest Loser

2004–2020 18 Seasons 263 Episodes Reality TV-PG ⭐ 5 / 10

The Biggest Loser has been quietly earning a loyal audience, and right now it is all available in the US on Amazon Prime Video, and in the UK on Amazon Prime Video. Erica Lugo leads a cast that brings something genuine to every episode. What sets The Biggest Loser apart from the dozens of similar shows is hard to pin down in a single sentence — it is partly the writing, partly the performances, partly the way it commits to its premise without flinching. Impossible to stop watching once you start: that is the shorthand, but it undersells how well The Biggest Loser executes on it. An audience of 30 has voted with their time — and their score reflects a run without many weak episodes. The streaming access means you can form your own opinion tonight, without any barrier to entry.

What separates The Biggest Loser from the rest of its genre is a genuine understanding of what its audience actually wants to watch. The Biggest Loser features obese people competing to win a cash prize by losing the highest percentage of weight relative to their initial weight. Erica Lugo and Steve Cook lead a cast that brings real weight to the material. The series ran for 18 seasons (2004–2020), building a story that gave its audience time to invest properly. The format has been replicated endlessly since The Biggest Loser first aired, which is its own form of tribute. It delivers reliably on what it promises, which is more than most of its competition manages.

Reality TV sceptics are warned: The Biggest Loser has converted more than a few people who were convinced the format was not for them. 18 series in and still appointment viewing — the format never goes stale because the casting and production keep it fresh. The format works because the production understands its own premise and executes on it without apology. If The Challenge is already in your viewing history, you already know whether this is your kind of television. The kind of television that generates strong opinions — you will have them, and so will everyone else who watches it.

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📺 Where to Watch The Biggest Loser

United States

United Kingdom

Canada

🎭 Cast of The Biggest Loser

EL
Erica Lugo
Self
Steve Cook
Steve Cook
Self
Bob Harper
Bob Harper
Self - Host

🗂️ All Seasons of The Biggest Loser

1
Season 1
12 Episodes · 2004
2
Season 2
12 Episodes · 2005
3
Season 3
13 Episodes · 2006
4
Season 4
15 Episodes · 2007
5
Season 5
16 Episodes · 2008
6
Season 6
14 Episodes · 2008
7
Season 7
21 Episodes · 2009
8
Season 8
13 Episodes · 2009
9
Season 9
19 Episodes · 2010
10
Season 10
13 Episodes · 2010
11
Season 11
21 Episodes · 2011
12
Season 12
13 Episodes · 2011

📋 If You Like The Biggest Loser, Try These

The Challenge
1998
Chopped
2009
The Amazing Race
2001
Squid Game: The Challenge
2023
The Voice
2011
The Mole
2022

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