DISCOVERY CHANNEL

Bill and Grady head to Maine where they go through a bog and face a storm.

Ed visits the Hamar cattle herders of Ethiopia to witness a unique rite of passage. Later, he explores their ancient culture as the tribe's young men must successfully jump over a line of bulls.

Bear Grylls next challenging adventure is in hell's canyon, Oregon.

Bear Grylls draws upon all his experience as a survivor to tackle the dangers of the Costa Rican rainforest, climbing 100 ft trees and down 120 ft waterfalls, facing snakes and sweltering humidity.

Tigre and Rene need to escape from Los Llanos, a hostile region in the heart of a savannah between the Andes and the Amazon jungle.

Escaping the city's clamour, actor Wang Yibo immerses himself in Hainan's verdant rainforest, seeking out its secretive gibbon inhabitants.

Mountaineers survive in the Alps in potentially fatal conditions.

Bear is locked in the backwoods of Alabama where he navigates freezing white water rapids and braves a raging forest fire. But can he escape a deep limestone cave?

Ed Stafford attempts to survive in the jungles of Borneo for 10 days on his own without food, water or even a knife to sustain him.

Bear Grylls navigates lava flows and scrambles through caves in an active volcano. Additionally, he must stop a viper from nesting beside him while he sleeps.

Ed Stafford travels the globe to attempt the world's toughest coming-of-age rituals.