Last night's 'The Biggest Loser' had a twist in its tail. As promoted all season, all of the eliminated contestants returned to face off against the Final Four in a marathon. The winner of this race automatically earned a spot in the Finals, no matter when they were sent home.

Not only did they have to run a marathon ... this time it was in the desert. But at least there were cash prizes on offer for the first five finishers to help assuage the post-marathon agony. So who came out on top and made it to the Finals? And what twist did the producers have in store for the Final Four? !!SPOILER ALERT!!