Winter comes to Longyearbyen, meaning 24 hours of total darkness and extreme Arctic weather. Witness the aftermath of an unthinkable tragedy, when an avalanche claims the life of the local teacher and a young child during a brutal storm.

After the Arctic's warmest winter ever recorded, the residents of Svalbard are witnessing the effects. Professor Chris's students measure a glacier, Alex takes a tour to a Russian mining settlement, and Lara spends a day cleaning up after 200 dogs.