Watch The Biggest Loser Season 9 Episode Online Stream. Loss Weight is the name of the game and in this series, the title says it all. Who will be among of the contestants have the heart on losing weight as much as possible? This season will be amonng of the best ever so far. People from all walks of life who are all plus size are taking this challenge to see on who is the Biggest Loser. This season 22 contestants takes the challenge. Who will be the Biggest loser this season? Find out and Watch The Biggest Loser Season 9 Episode Online Stream.