Extreme Animals features environments that may be hostile to humans, but are havens to many animals. Encounters with gorgeous glow-worms, high-flying condors, parched thorny devils, emperor penguins and polar bears feature in this journey through life on the edge.

Grasslands are the great stages of the natural world, where large animals play out spectacular lives in clear view of people. From the African grasslands the series showcases lions, leopards, elephants, rhinoceros, cheetahs and impalas. Australian kangaroos, wallaby and the wonderfully odd potoroo join American bison and wolves in a grand tour of iconic animals.

Marine Animals features charismatic animals that inhabit a realm humans can only fleetingly enter. From the surprises of colourful reef characters to playful penguins, killer sharks and regal whales, this episode dives into the places where nature reveals itself in some of its most marvellous and bizarre forms.

Forest Animals gets up close with bears, koalas, moose, wolves, weaver ants and Tasmanian Devils. This episode roves across dark forest floors and soars above vast canopies of green in America, China, Laos and Australia.

Wetland Animals dives into the swamps, rivers and flood plains of Florida's Everglades, Botswana's Okavango Delta, Kakadu National Park in Australia, the Amazon and more. Meet deadly crocodiles, alligators and piranhas, wading elephants, hippopotamus and flamingo, and unlikely swimmers such as the manatee and platypus.

In Jungle Animals, viewers encounter gorillas and orangutans, killer pythons, delightful monkeys from three continents, awe-inspiring tigers and millions of land-dwelling red crabs. This episode explores Australia, the islands of Southeast Asia, Africa and the Amazon.