Plot: The Biggest Loser (season 4) is the fourth season of the NBC reality television series entitled The Biggest Loser. The fourth season premiered on September 11, 2007 with 18 overweight contestants in a weight loss competition for an ultimate prize of $250,000
First Episode Aired On:
Tuesday, September 11 2007 17 years ago
Last Episode Aired On: Tuesday, December 18 2007 17 years ago
