Christine and her lead dog prepare for Svalbard's biggest dog sled race, Wiggo struggles to quit smoking, and Doctor Echhardt explains how his small team has dealt with frostbite, polar bear attacks, and emergency rescues.

Ben is close to launching his local food business, while Wiggo and his wife, Claudia, set out in search of the summer's first Arctic cod. Mark joins tourists visiting the world's northernmost ghost town, and Sasha gives an entertaining tour.