The Biggest LoserThe Biggest LoserSeries 1Season 1 · 2005 · 11 episodesEpisodes1Season 1 Premiere2Season 1, Episode 23Season 1, Episode 34Season 1, Episode 45Season 1, Episode 56Season 1, Episode 67Season 1, Episode 78Season 1, Episode 89Season 1, Episode 910Season 1 Finale11Episode 11Season 2Season 3Season 4Season 5