The series begins by travelling from pole to pole revealing the frozen worlds that exist across the world and the animals that live in them. Antarctica, the Himalaya, the Great Steppe, boreal forest, tundra and the Arctic are visited.
This edition looks at the Arctic Ocean, as after 4 months of winter darkness the sun returns. Mother polar bears emerge from their dens, a pod of beluga whales confined to an ice hole wait for release, harp seal mothers teach their pups.
Explore ice worlds born of altitude. Found on every continent, these icy 'islands in the sky' pose a range of challenges for the animals who choose to live there.
This episode goes behind the scenes with the production team, revealing the astounding challenges they encountered in sometime dangerous conditions while on location.