This is a list of episodes of all seasons of the Australian television series The Biggest Loser.
The first season averaged approximately 1,400,000 viewers, with the finale watched by 2,300,000.
The fourth season started off with a peak of 1.7 million viewers and averaged 1.2 million over the premiere episode. The finale night scored 1.7 million, beating Underbelly's: A Tale Of Two Cities, with a successful finish of 2 million viewers when the winner was announced.
The sixth season, also known as ', premiered on 30 January 2011 with 1.356 million viewers tuning in, making it the fourth-watched program that night.
The seventh season also known as aired on 23 January 2012.
The eighth season also known as aired on 17 March 2013.