Steve Backshall begins his global journey at the top of the world when he boards an Arctic icebreaker and goes in search of the Arctic's top predator, the polar bear.

Steve and the crew continue on their epic Pole to Pole journey and head south to Somerset Island high in the Canadian Arctic.

Steve and the crew are in Alaska, where Steve abseils into the heart of a glacier, experiencing a cold, harsh and inhospitable world that pushes him to his limits.