Overview
Morgan gets stuck in the grips of an ice desert with no shelter in sight; Marty's return to Alaska's Revelation Mountains takes an unexpected turn.
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4 - 1Adapt or Die June 18, 2015 -
4 - 2Dark Crossing June 25, 2015
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4 - 3Welcome to the Tundra July 02, 2015
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4 - 4Best Laid Plans July 09, 2015
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4 - 5Deadly Ascent July 16, 2015
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4 - 6Snowblind July 23, 2015
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4 - 7The Fallen July 30, 2015
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4 - 8Lifeblood August 06, 2015
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4 - 9So Close, Yet So Far Away August 13, 2015
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4 - 10Hard Target August 20, 2015
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4 - 11Touchdown August 27, 2015
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4 - 12Miles to Go September 03, 2015
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4 - 13In the Blood September 10, 2015
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4 - 14Winter's Gamble September 17, 2015
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4 - 15Awakening September 24, 2015
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4 - 16Hard Fought and Fairly Won October 01, 2015