4x1 - Arctic Circle

August 12, 2009

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

4x2 - Alabama

August 19, 2009

Grylls wrestles a pig, squeezes through some tight spots, and survives a forest fire in the swamps of Alabama. It is revealed that Grylls broke his shoulder while in Antarctica two months previously.

4x3 - Vietnam

August 26, 2009

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

4x4 - Texas

September 2, 2009

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.

4x5 - Alaska

September 9, 2009

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

4x6 - Pacific Island

January 6, 2010

Grylls is on a deserted Panamanian island; he creates fresh water and chooses to use tribal fishing techniques before battling the sea on a makeshift raft. Later in the episode he gives himself an enema in order to stay hydrated on the open seas.

4x7 - China

January 13, 2010

Bear does all his usual acrobatics while suffering through Typhon Parma in China including swinging on a vine, monkey climbing over a gorge and cliff diving.

4x8 - Big Sky Country

January 20, 2010

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.

4x9 - Guatemala

January 26, 2010

4x11 - North Africa

February 17, 2010

Grylls crosses the Sahara desert to the North Africa coast, where he catches an octopus, fashions a shelter out of acacia trees and dines on moths and locusts.