Once a mountain kingdom of ancient palaces and emperors, Korea in the 21st century is largely known for its modern cities and decades of conflict. Tensions between North and South may be what defines it to outsiders but beyond the battle scars there is another side to Korea. In the south are large pockets of untouched wilderness where extraordinary animals flourish and Koreans continue to practice age-old traditions in tandem with the seasons and with nature. It is in these connections, rather than in division, that we see the true Korea. At the southernmost tip of the peninsular we follow a pod of bottlenose dolphins through the volcanic islands of Jeju. They click at each other as they encounter a human in their midst, but the dolphins know this diver well - they have shared the ocean with the Haenyeo, or sea women, for thousands of years. We travel onwards to the isolated island of Marado, where three generations of sea women are preparing for a dive. Today is the start of the conch season, and they work hard whatever the weather to maximise their catch. In the grounds of an ancient palace on the mainland, a raccoon dog family takes advantage of a rare event. Just once every five years, hundreds of cicadas emerge from below ground providing an easy feast for the raccoon dogs who voraciously fill their bellies. Those that escape their jaws make for the safety of the trees, where they metamorphosise into their flying form. On the mud flats of Suncheon Bay we find a habitat that is neither land nor sea. Only recently has the ecological value of mudflats been recognised. A staggering 50 per cent of the earth's oxygen is produced by phytoplankton - microscopic algae that are found here in great abundance. That is why the mudflats are known locally as the lungs of the earth. Plankton is far from the only life here - the mud of the bay is rich in nutrients and supports one of the most diverse ecosystems on the peninsula. We follow the story of a young mudskipper who has emerged for his first mating season. His journey to find love is paved with obstacles.
Professor Alice Roberts meets our ancient ancestral family, from armadillos to sharks, and discovers our true place in the tree of life. With 4D scanning, giant origami and a ukulele, they will explore evolution like never before.
Mammals' ability to learn new tricks is the key to survival in the knife-edge world of hunters and hunted. In a TV first, a killer whale off the Falklands does something unique: it sneaks into a pool where elephant seal pups learn to swim and snatches them, saving itself the trouble of hunting in the open sea. Slow-motion cameras reveal the star-nosed mole's newly-discovered technique for smelling prey underwater: it exhales then inhales a bubble of air ten times per second. Young ibex soon learn the only way to escape a fox - run up an almost vertical cliff face - and young stoats fight mock battles, learning the skills that make them one of the world's most efficient predators.
The Andes is the longest mountain range in the world and home to astonishing hidden worlds, extraordinary animals and remarkable people. A female puma and her three cubs hunt in the mountains of the frozen south. Spectacled bears search for water on scorched mountain forests and the descendants of the Inca gather in an ancient ceremony to build a bridge made from woven grass. High in the cloud forest, a newly discovered shape-shifting frog baffles scientists with its superpowers and in the Atacama desert - the driest place in the world - strange reptiles battle for access to precious water. This is the mountain range of surprise and wonder.
The undercover cameras reveal how animals often get up to mischief among themselves - and some are downright criminal. A colony of adelie penguins hunker down to avoid a storm, unaware one of them is a thief out to steal the stones that make up their nests, and Spy Tropicbird witnesses an aerial attack by aggressive frigate birds who attempt to steal his fish. A boisterous elephant has a temper tantrum in the mud near the waterhole, chimpanzees have extra-marital affairs and lemurs get high by sniffing toxic millipedes.