` The Biggest Loser will feature 90-minute episodes when Season 8 kicks off the past two years . `` `` The Celebrity Apprentice '' , '' The Biggest Loser switched to 120-minute episodes . It 's the structure of competition reality shows that keep people watching , expert says .
`` Project Runway '' will feature 90-minute episodes when Season 8 kicks off Thursday . `` The Biggest Loser , '' `` The Celebrity Apprentice '' switched to 120-minute episodes . It 's the structure of competition reality shows that keep people watching , expert says .