World's Greatest

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

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: deadly crocodiles, alligators and piranhas, wading elephant, hippopotamus and flamingo, unlikely swimmers manatee and platypus.

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

Ocean Animals features the world's most charismatic animals that inhabit a realm humans can only fleetingly enter. From the surprises of colorful reef characters to effervescent penguins, killer sharks and regal whales, the episode dives into the places where nature reveals itself in some of its most marvelous and bizarre forms.

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

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.