Simon travels to an unspoilt corner of Greenland that could become one of the biggest uranium mines in the world, while Kate follows the oil money that's shaped Alaska. In Churchill, Gordon learns how to stay safe when living side by side with the world's largest living land carnivore.
Gordon meets the Polar Bear Cops tasked with keeping the town safe. Kate heads to Sweden to help round up some reindeer and Simon joins the intrepid NASA scientists monitoring the melt of Greenland's glaciers. Plus, all the live action from the bears out on the tundra.
Kate meets the Inuit artists inspired by the changing world around them, while Simon heads off on a fishing expedition, Arctic style. In Churchill, Gordon finds out how the town deals with their more troublesome bears when he follows the eviction of a repeat offender.
The team discover why the Arctic is changing faster than anywhere else on Earth. In a place where life is driven by ice, we see what happens when it disappears.