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The crew are forced to camp among the prime habitat of enormous Brown Bears. They find a ship wreck and the team question Steven's leadership.
The expedition enters the Bering Sea. With huge waves, fading light, fog and rain the men and their machines are hoisted onto a crab vessel to spend the night.
The expedition attempts a 100 mile open water crossing. Charles nears hypothermia. Fall approaches and the men fear they may never reach the Bering Strait.
Steven develops a high fever and the team goes to work without their leader. The men see Herds of Caribou and end up camping on the edge of the world.