The Biggest Loser Australia

Episode 29 (1x29)

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Contestants are driven out to some sand dunes for their latest challenge, where they must race up the largest sand dune, down it, up it again, back down and then up once more. For the winner, the chance to chose any contestant to weigh in 24 hours earlier than all the others. With Wal's sights set on Shane, could this cause the game's biggest upset so far?