This incredible story charts the challenges facing polar bears and their cubs during their first summer. As they emerge from their den on a remote Norwegian island, the polar bear families are followed by a new generation of covert devices - Blizzard-cam, Snowball-cam and Iceberg-cam. Backed up by Snowcam and Driftcam these state of-the-art camouflaged cameras reveal the extraordinary curiosity and intelligence of the polar bear. Capturing an intimate portrait of polar bears' lives, this two-part series reveals how their intelligence and curiosity help them to survive in a world of shrinking ice. Another instalment of the innovative release from the BBC Spy-in the series.