The Biggest Loser (2004) is a Reality series that follows the Biggest Loser features obese people competing to win a cash prize by losing the highest percentage of weight relative to their initial weight. Currently, you can watch The Biggest Loser on Amazon Prime Video, Amazon Prime Video with Ads, Amazon Video, Apple TV Store. Streaming availability may vary by country and platform over time. It has a user rating of 5.3 out of 10 from 29 votes. Fans of reality series may also want to explore similar titles below.