Shocking sabotage and a midnight medical emergency upend the competition. The elimination challenge requires a photo finish. In a test of skills, survivalists must build primitive ladders, torches and hooks to claim critical caches. A legend is sent home.

Under the sweltering Outback sun, competitors scramble to build Aboriginal dome shelters and avoid elimination. Medics race to give aid when Laura suffers whiplash, and Trish gets toxic sap in her eye. A survivalist must be evacuated via stretcher.