Cold Islands

S1, E3: On the opposite extremes of the globe, dotting the northern and southern hemispheres, a great many islands are home to the protagonists of this episode. Adapted like no others to the rigors of the climate, a king penguin, an albatross, a grizzly bear, a group of walruses, a baby elephant seal, and a giant petrel will be our guides and they will teach us how they are able to survive.