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

Bear Grylls navigates the jungles of Belize.

Bear Grylls travels to Turkey to test his survival skills.

Bear Grylls enters the forest of Transylvania, where he encounters steep ravines, an underground water system and an adult brown bear.

Bear choppers into petrified swamps devastated by the 2004 tsunami and has to navigate his way out, facing killer lizards, snakes, waterfalls and sheer cliffs.

Bear advises how to survive on a deserted island without food or running water.

Bear Grylls heads into the bush of Zambia and survives some of the world's biggest rapids.

Bear Grylls demonstrates how to survive in Namibia, one of the hottest, most-barren places on Earth.

Bear continues his travels in the Sanyan mountains of Siberia where he meets the Tuvans, who have lived there for 20,000 years; he eats squirrel and swims naked through icy water to illustrate survival techniques.

Bear Grylls parachutes into the Siberian tundra, one of the coldest and harshest places on Earth.

Bear Grylls takes viewers into nature's kitchen.

Bear Grylls survives wild weather in the wilderness of Patagonia.

Bear Grylls demonstrates how to survive on a deadly Patagonian glacier.

Bear Grylls demonstrates the survival skills needed to navigate through the deadly jungle of Panama.

Bear tackles the deadly mangrove swamps and infamous viper habitats of Panama.

Bear puts his survival skills to the test in the blistering heat of the Sahara Desert.

Bear puts his survival skills to the test in the blistering heat of the Sahara Desert.

Bear Grylls demonstrates how to make a snow cave, find water in deep tunnels and avoid frostbite in Iceland's arctic conditions.

Bear Grylls demonstrates how to survive in Mexico's Copper Canyon.

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

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

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.

Surviving in the wild is not an exact science. Beyond the basics of finding water, food, shelter and eventually help, opinions vary. Two experts tell how they think it's done in this series, as initial episodes feature trained survivalists Dave Canterbury and Cody Lundin demonstrating the skills and creative thinking that can help one cope in tough surroundings. Equipped with minimal gear, the pair are left in remote locations -- an uninhabited island off Nova Scotia, a New Zealand mountaintop, deep in the Everglades, the jungle of Thailand, and the desert of Baja California, to name a few -- where they battle the elements and sometimes each other. Season 3 introduces U.S. Special Ops veteran Joseph Teti to replace Canterbury, in the middle of Season 4 primitive survivalist Matt Graham of Discovery's "Dude, You're Screwed" replaces Lundin, and partway through Season 5 producers forge new partnerships by rotating survival experts as hosts.

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.

Adventurer Ed Stafford has walked the length of the Amazon River -- he is the first person to accomplish that -- so perhaps being stranded on a desert island near Fiji without clothes, food, water and tools and attempting to survive for 60 days isn't that daunting. The only possessions he does have are cameras, and so viewers are provided a fly-on-the-wall perspective of Ed's attempts to find food, make fire, process water to drink, and build a shelter -- among many other tasks that will help him stay alive.

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.

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.

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.

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.