DISCOVERY CHANNEL

Dropped in the foothills of the Andes in Argentine Patagonia, Ed faces extreme exposure to both intense sunlight and freezing temperatures, eating tadpoles and ant eggs.

Bear travels to America's greatest mountain range-the Sierra Nevada. He uses his knowledge of American Indian survival techniques to build shelters, calm wild horses, and find food.

Survivalist Bear Grylls treks across the Siberian tundra and into the Sayan Mountains, demonstrating a wide range of survival skills.

Explorer and adventurer Ed Stafford takes on various experts from around the world in a challenge to survive in extreme environments.

Survival experts Cody Lundin and Dave Canterbury take on the planet's most unforgiving terrains and demonstrate valuable survival skills.

Bear Grylls shows how to survive the big island of Hawaii, home to Kilauea, the world's most active volcano and one of the toughest places on Earth.

In the western fjords of Norway, Ed is on top of a snow-covered mountain. Under constant risk of hypothermia, he soon faces a spring tide that threatens to ruin his shelter.

Bear Grylls emulates the personality of Tarzan as he navigates through the jungles of Belize, where he comes face to face with a 9 foot boa constrictor.

The survivors take part in a challenge with a high reward and a free pass at the tribal council. Later, Mark and Val seek revenge.