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In this leg of the expedition, our eight survivalists paddle 40 miles through a minefield of icebergs and glaciers in Prince William Sound. Massive waves and powerful tides beat against their boats as they struggle to stay upright and stay together. Making matters worse, a thick fog rolls in and one of the men goes missing! Now, the teammates are faced with a tough decision: do they stay and look for the missing competitor, or head for the extraction point where he could be waiting?