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TV Trailers
TV Trailers

The Biggest Loser Seasons

Ended 2005–2012
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All seasons

4 seasons - 40 episodes
Season 5
Season 5 2012
9 episodes - Jan 3, 2012
Season 4
Season 4 2011
8 episodes - Jan 10, 2011
Season 2
Season 2 2006
12 episodes - Oct 11, 2006
Season 1
Season 1 2005
11 episodes - Oct 6, 2005