The Frozen Kingdom is an extensive tour of the Earth's coldest places where a surprising variety of life is found. Ice worms and polar bears, killer whales and docile humpbacks, lumbering walrus bulls and slight arctic foxes all thrive in these seemingly uninhabitable climes. In the Arctic Circle, we follow a polar bear mother and her cubs in search of food and visit a colony of harbour seals. In the Gulf of Alaska, bull walruses and fur seals bludgeon one another in competition for a mate. Glacier Bay, in Alaska, hosts the annual migration of humpback whales whose haunting songs and giant brains hint at vast intelligence. Extraordinary footage taken off the coast of Patagonia shows killer whales attacking seals on a beach before batting them with their tails and finally devouring them. Finally, we visit Antarctica where emperor penguins cope with temperatures that can reach a hundred degrees below zero.