Summary: Grylls is on a desert island, south of Papua New Guinea. He wades across a shark-infested tidal channel, climbs crumbling volcanic cliffs, leaps over a 100-foot death drop, and constructs a bamboo windsurfer to make his escape.

Summary: In Australia's Northern Territory, Grylls must rely on many of the skills honed by the Aboriginal people to survive in this sweltering landscape dominated by crocodiles.

Summary: While in the Canadian Rockies, Grylls is buried alive in an avalanche, swims long distance beneath an ice-covered lake, and is airvac-ed to the hospital when an icy glissade goes horribly wrong.

Summary: Grylls lands in the snow-capped Caucasus Mountains of the Georgian Republic by driving a snowmobile out the back of a hovering helicopter. He ziplines across a river, camps among wolves and trudges through swampy wetlands.

Summary: Grylls takes two fans into the Canadian wilderness for their ultimate survival challenge. They face their fears head on, trek down dangerous glaciers and across a frigid glacial river, build a rustic shelter, and try to swallow typical Grylls fare.

Summary: In the Mojave Desert Grylls puts himself in the path of a man-made sandstorm, takes on the full force of a man-made flash flood and HALO jump from 30,000 feet. His body is pushed to the limit as the temperature soars from minus 40 to 110 degrees.