Polar Bear Preview
Video duration: 0:31
Mark Evans travels to the shores of Canadas 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 seriously injured and a bear dead. He joins the Polar Bear Alert team as they transport a captured bear by helicopter to a release site outside town. Airs 9/3 at 10pm ET. Check local listings.