Mark Evans travels to the shores of Canada's Hudson Bay where polar bears are causing havoc in isolated communities. He arrives in the town of Churchill hours after an attack has left two people with serious injuries and a bear dead. Mark joins the Polar Bear Alert team as they transport a captured bear by helicopter to a release site outside town. And in the Inuit town of Arviat, Mark works with wildlife officers to test an aerial drone early warning system, a military grade ultra-loud speaker to deter bears and a controversial experiment to place meat out on the tundra to divert bears away from town.
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