Bear Grylls demonstrates how to survive in Australia's outback.

Bear Grylls demonstrates how to survive in Ecuador's jungles.

In New Zealand, Bear is heading towards civilization but first he must cross a raging river, climb an active volcano and scale a waterfall.

After parachuting into this remote area, Bear must cross the country's highest mountain range and figure out how to start a fire in a waterlogged forest if he is to survive this adventure.

Bear Grylls struggles to find food and freshwater off the coast of Borneo.

Bear Grylls battles torrential rain, snakes and leeches to survive in the Borneo jungle.

Bear Grylls gives tips and techniques on how to find water in the desert.

Bear rappels onto a live volcano in Guatemala, navigates a waterfall, creates a nest to sleep in and encounters ancient Mayan ruins.

In the aftermath of a typhoon in China, Bear encounters swollen rivers, limestone gorges, and stinging ants, and catches bats for food.

Bear goes paragliding above the Rockies, traverses gullies and makes the most of abandoned debris.

Bear Grylls creates critical fresh water and uses tribal techniques to fish while deserted on a Panamanian island.

Bear Grylls goes to Alaska, where he ice-hops onto a glacier, hangs by his fingertips over a waterfall and avoids getting crushed between an iceberg and his rescue vehicle.

Bear goes to Texas and navigates a desert and deep gorges and encounters a diamondback rattlesnake.

Bear Grylls encounters leeches and a deadly spitting cobra, eats a forest scorpion and avoids a river flood in the jungles of Vietnam.

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

The crew discusses how they produce "Man vs. Wild" and what it feels like to follow in Bear's footsteps.

Surviving scorching deserts and freezing mountains in Arizona.

Bear travels to Alabama, where he takes on white water, comes face to face with a wild boar and braves a raging forest fire.

Bear Grylls takes on Hell's Canyon in Oregon, where snowdrifts, frozen lakes, burnt-out forests, and frigid white-water rapids await.

Bear Grylls demonstrates how to survive hurricane season in the Dominican Republic.

Bear Grylls navigates the jungles of Belize.

Famed survivalist Bear Grylls says goodbye to Hollywood and takes celebrities on journeys into some of the wildest locations in the United States and around the world. Whether it's searching for food in the most remote environments or battling intense weather, each episode chronicles the celebrity's experience of pushing their body and mind to the limit to successfully complete the adventure.

Noted survivalist and adventurer Bear Grylls presents footage of great escapes and near-death experiences in this program that sees other people in danger instead of Bear. The people who survived the events in the videos -- including runaway cars, animal attacks, and parachutes that don't open -- tell the stories behind what happened to them. Episodes also feature experts offering survival tips and how-to advice for viewers. At the end of each episode, Bear chooses his favorite clip that aired during the show.

World famous adventurer and survival expert Bear Grylls reveals the true stories of ordinary people who found themselves in extraordinary life or death situations. Bear ventures into jungles, snow-capped mountains, burning deserts and steep canyons to replicate the key moments and terrifying realities of the encounters, from bandit attacks and avalanches, to being lost in ferocious sand storms and being confronted with bears. He talks about what the survivors did to help their cause, and demonstrates some of the mistakes they made along the way that nearly cost them their lives.

TV's most extreme survival challenge just grew extra-large. Veteran survivalists familiar with the stripped-down drill after appearing on "Naked and Afraid" attempt to survive in a desolate, dangerous environment for 40 days -- 19 more than they previously experienced on the show. Pushing the very limits of human endurance, the men and women must all vie for the same limited food, water and shelter while avoiding territorial-sensitive predators and venom-filled reptiles. Because there is no other choice, the competitors quickly get to know one another -- and their surroundings -- and hope that their instincts, survival skills and intestinal fortitude serve them well.

Extreme survivalists go head to head in a race across the Alaska wild. Using ingenuity, experience and just the gear they can carry in their packs, the participants have 60 hours to reach the finish point of each leg of the adventure -- the series features 13 legs -- and in addition to navigating treacherous glaciated river valleys, barren ridgelines, and high mountain peaks, the challengers battle hunger, dangerous predators and unpredictable weather. There is no grand prize awaiting each leg's winner, other than the pride of accomplishing a grueling feat. For season three, the 12 competitors are divided equally into four teams -- Military, Endurance, Alaskans and Lower 48.

The breathtaking beauty of Alaska sometimes hides the fact its winters can be incredibly harsh, especially for those who live in the state's outlying areas. "Alaska: The Last Frontier" perfectly illustrates this reality, as the series profiles life for the Kilcher family in the isolated community of Homer. For four generations the Kilchers have lived off what their 600-acre homestead has provided, but cultivating that living is never easy. Led by patriarch Atz Kilcher and his brother Otto, the family spends the short summer and fall gardening, hunting and fishing for food, gathering supplies from the land and preparing their animals for the winter. Viewers, who may or may not have a fancy phone by their side while watching on their big-screen high-def TV, also see the Kilchers living off the grid, where running water and electricity aren't daily staples, nor is contact with the outside world. Atz, by the way, is the father of music superstar Jewel.

Discovery Channel takes the ubiquitous survival show theme to the next level by stripping it to its bare essentials. In "Naked and Afraid," complete strangers -- usually a man and a woman -- meet in a very unique way: They're stranded in a dangerous, desolate location, without food or water, and they're completely naked. Each episode follows the adventurers as they attempt to survive on their own with nothing but a personal item and the knowledge that the only prize is their pride and sense of accomplishment. Because there is no other choice, competitors quickly get to know one another -- and their surroundings -- and hope that their instincts, survival skills and intestinal fortitude serve them well.