From tension between Bob Harper and Jillian Michaels to one contestant nearly dying on the set, the new series was full of secrets.

The Reality of ‘The Biggest Loser’ premiered on August 15, 2025, on Netflix. The three-part docuseries examines NBC’s The Biggest Loser, with all episodes released simultaneously.

Netflix is dropping this three-part docuseries called Fit for TV: The Reality of the Biggest Loser on August 15, 2025. If you ever wondered what went down behind the scenes on that show, this is your ticket. You can stream it anywhere, anytime, as long as you’ve got Netflix.