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Mechanical breakdowns and invading predators threaten the lives of six people as they try to survive the dark and cold winter in Alaska. In Kavik, a familiar sound startles Sue. She soon realizes that a deadly wolf has approached her cabin. Nineteen miles north of the Arctic Circle, Chip's snow machine breaks down, threatening his own survival since without it he cannot fish, hunt or trade. In Wiseman, Erik hunts for lynx fur to earn money but the beast outsmarts him every time.
Source: National Geographic Channel