DISCOVERY HD WORLD

Bear travels to America's greatest mountain range-the Sierra Nevada. He uses his knowledge of American Indian survival techniques to build shelters, calm wild horses, and find food.

In the lethal jungle of Panama, Bear Grylls tackles some extreme survival challenges and some grisly eats to show you how to get out alive.

Bear skydives into Australia's Northern Territory. He will rely on the survival skills honed by the aboriginal people to survive in this sweltering landscape.

Bear is marooned on a desert island south of Papua New Guinea. He wades across a shark-infested tidal channel and constructs a bamboo windsurfer to make his escape.

From diving without a mask in the tropics, to finding water in the desert, Bear Grylls travels the world, sharing his tips and techniques for survival.

In the lethal mangroves and infamous viper pits of Panama, Bear Grylls tackles some extreme survival challenges and some grisly eats to show how to get out alive.

In the lethal mangroves and infamous viper pits of Panama, Bear Grylls tackles some extreme survival challenges and some grisly eats to show how to get out alive.

Bear is in the Caucasus Mountains driving a snowmobile out the back of a hovering helicopter. Later, he ziplines across a river and trudges swampy wetlands.

A survival expert tries to survive the sweltering, crocodile-infested Northern Territory.

Mountaineers survive in the Alps in potentially fatal conditions.

Bear travels to America's greatest mountain range-the Sierra Nevada. He uses his knowledge of American Indian survival techniques to build shelters, calm wild horses, and find food.

In Scotland's Cairngorm Mountains, adventurer Bear Grylls faces arctic blizzards, traps rabbits for food and uses a deer skin for shelter.

Bear Grylls shows how to make a snow cave, find water in deep tunnels and avoid frostbite in order to survive Iceland's extreme conditions.

Bear drops from a bi-plane into the Chihuahuan Desert in West Texas, where he withstands extreme heat, navigates deep gorges and dodges deadly diamondbacks.

Bear is dropped into the Chugach Mountains of Alaska, where he tries to withstand extreme temperatures, navigate forests and avoid territorial black bears.

Bear Grylls introduces his crew, including his fearless cameraman and recounts the challenges they face during their adventures.