Bear brings along a companion, actor Jake Gyllenhaal, to test how he measures up to unpredictable and unforgiving Mother Nature.

Grylls heads to Romania where he takes on a bear and dangerous water channels.

Grylls is in a post-disaster urban city scenario and he must survive. His thirst to live and survival techniques modified for a city environment keep him alive in a concrete wasteland in Gdynia, Poland.

Grylls travels to Panama, where he travels in the equatorial heat through mangrove swamps and rain forest, and endures more than 100 mosquito bites and one painful snake bite.

Grylls battles the fierce swamps in Sumatra, Indonesia. As he struggles to keep dry and avoid trench foot, he runs into several types of wildlife, including lizards and the deadly mangrove snake.

In the sun-scorched Sahara Desert, Grylls uses survival tactics of the indigenous people, including eating a scorpion and a sandfish. He also explains how to escape from quicksand.

Grylls heads to Turkey where he deals with dangerous animals and he also takes to the water.

Grylls demonstrates what it was like for soldiers who had to survive in the jungles of Vietnam, during the Vietnam War.

Grylls takes on Big Sky Country. He paraglides above the Rockies, traverses vast gullies, and makes the most of abandoned debris before making his great escape on a moving train.

This week Bear braves the remote wilderness of New Zealand's South Island, crossing the country's tallest mountains and attempting to start a fire with wood that is soaking wet.

Bear Grylls spends a week showing how to survive the challenges of the Pacific Ring of Fire. He is dropped into petrified swamps devastated by the 2004 Tsunami and has to navigate his way out.

With temperatures dipping to -50°C, Grylls has to keep warm before hypothermia sets in. He uses snares to catch his food, and a fire to keep warm. He puts up a scenario for the great dangers to walk over a frozen lake, and how to survive without drowning and/or before hypothermia sets in.

Grylls must cross blistering desert and barren salt plains in Mexico's Baja peninsula. While collecting honey Grylls is stung by a bee and his face becomes severely swollen, nearly blinding him.

Grylls has some tips on how to survive the hurricane season and he also eats a cooked tarantula to survive. He tells us about the hairs on the tarantula's back legs and how they defend themselves using the hairs.

In the desert, Grylls offers tips on skinning and disemboweling a dead camel for water.

Grylls parachutes into Patagonia, the southernmost tip of South America, where he first encounters a vast ice field, then forages in a beech forest, wades through a frozen bog and swims through icy water.

Bear Grylls ventures into the landlocked country of Zambia in Southern Africa. Before heading into the bush, he shows you how to survive some of the world's biggest rapids.

Grylls parachutes into the heart of the Namib desert. He eats a puff adder and encounters the indigenous bushmen.

Grylls is in Siberia, learning survival techniques from the Tuvans and, eating raw yak liver as well as drinking its blood for food.

Grylls enters the swamps of Louisiana where he kills an alligator with a knife, and catches a catfish with his bare hands

Grylls jumps from a boat a kilometre off the west coast of Ireland. He travels down the coast before turning inland to cross the bogs. Here he retrieves a sheep carcass from a bog whose skin he uses as a sleeping bag (sheeping bag), a waterproof sack, and a flotation device.

Grylls takes on the deepest river based canyon, Hell's Canyon and the dangerous Snake River.

Grylls goes to the Arctic Circle, where he encounters a frozen waterfall, wild reindeer and some of the coldest conditions on the planet.

In Western Texas, Grylls falls to earth from an upturned biplane into the parched Chihuahuan Desert; he traverses deep gorges, locates an oasis and takes on a diamond back rattlesnake.

Grylls returns to the wilderness of Alaska to survive the dangerous terrain of the Last Frontier.