Islands (S02E01)

For some, remote islands offer sanctuary away from the mainland: the tiny pygmy three-toed sloth only survives because of the peace and safety offered by its Caribbean island home, while seabirds like albatross thrive in predator-free isolation. But island life isn’t always easy. In the barren, volcanic islands of Galapagos, marine iguanas have been forced to find food in the ocean, but their ingenuity allows a raft of other animals to survive - including deadly racer snakes. At the end of the Earth, more than 1.5 million penguins appear to have found their version of paradise on an active, wave-battered volcano. (Universal Sony Pictures Home Entertainment)