Longyearbyen on Svalbard is the northern most town in the world; a place where you aren't allowed to be born or die, carrying a gun is mandatory, and polar bears outnumber people.
Meet more quirky Svalbard residents, including Wiggo the taxi driver who's a dead ringer for Santa and Ben the chef who's attempting a food revolution with worm cookies.
After one of the worst storms to hit the town in 30 years, the residents struggle to come to terms with a huge tragedy - an avalanche that has killed a teacher and a young child.
Christine puts her new dog sledding skills to the test by entering the Hilmar Nois dog race: a 40 km race out into the wilderness that will be a test of her skill and endurance.
Professor Chris and some students investigate a glacier after the Arctic experiences its warmest winter ever recorded. Meanwhile, Alex takes a tour group to a Russian mining settlement.
Christine and Grace encounter frozen sea and a cabin vandalized by bears as they head to a remote location. Meanwhile, Mark reports on one of the island's most mysterious hidden buildings.
Christine's sister Catherine gets to grips with Arctic life when she visits from England. Meanwhile, snowmobile guide Alex attempts to take his girlfriend Karolina on a romantic trip.
Christine prepares for the island's biggest dog sled race. Doctor Martin Eckhardt explains how his small team have dealt with frost bite, polar bear attacks and emergency rescues.
Professor Chris heads out to check on an avalanche site ahead of Svalbard's annual ski marathon. Meanwhile, hotelier Mary-Ann continues her plans to host a concert with Bruce Springsteen.
Wiggo and his wife Claudia set out in search of the season's first Arctic Cod. Journalist Mark joins some tourists on a long trip to the world's northern-most ghost town; Pyramiden.