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River of No Return

The stage is set for the men to cross 200 miles of twists and turns of the Yukon River. They have 72 hours until they have to reach their extraction point. Here are Tyler, Brent, Matt and Marty standing at their campsite.

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The men are divided into two groups, building competing rafts. Mountain man Marty Raney is taking charge, building a colossal raft weighing nearly 2 tons which he hopes will be sturdy enough in the rapids. After spending five hours on construction, the five-man crew get on their way, but hunger starts to take its toll. Dallas Seavey, his brother Tyrell and survival expert Austin Manelick are meticulously engineering a smaller raft that's speedy and maneuverable to tackle the turbulent Yukon.