The Biggest Loser - Season 9 - Eps 4: Season 9, Episode 4
This week starts off with a high-stakes pop challenge in which contestants race for the prize of immunity - and the winning team also gets three envelopes to give to the teams of their choice with instructions that could have a dramatic impact at this week's weigh in. Also, tensions are high between the trainers and one team suspected of game play, and a lifting competition rewards the winning team with a prize that everyone wants.
About The Biggest Loser

Title: The Biggest Loser
First Air Date: 2004-10-19
Last Air Date: 2020-03-31
Status: Ended
Rating: 5.5/10 (from 27 votes)
Language: EN
Seasons: 19
Total Episodes: 263
Network: NBC
Genres: Reality
Production Companies: 25/7 Productions
Synopsis
The Biggest Loser features obese people competing to win a cash prize by losing the highest percentage of weight relative to their initial weight.
Cast

Erica Lugo
Trainer

Steve Cook
Trainer

Bob Harper
Host