
Steve Backshall's Extreme River Challenge
Steve and his crew kayak Baliem's lower gorge - one of the most extreme rivers.

Steve and his crew kayak Baliem's lower gorge - one of the most extreme rivers.

Brian Cox explains why the search for alien life should be taken seriously.

Steve Backshall sets out to explore one of the wildest rivers in the world.

Brian questions how far humans will go in their exploration of the cosmos.

The remote Xavante tribe in Brazil teaches Joel how to work through the pain barrier.

Bear Grylls' journey takes him from the deepest point in Britain to its highest mountain.

Joel travels to Steppe of Mongolia to find out if his western workout regime has prepared him.

Bear reveals the tropical past of the Yorkshire Dales while rappelling at Malham Cove.

Joel and Nish meet a shy and humble tribe of long distance runners, known as the Tarahumara.

Bear embarks on an exciting journey across Snowdonia; he comes face to face with a new born seal.

Joel takes part in a series of Maasai Warrior trials and sports in Kenya.

The remote Xavante tribe in Brazil teaches Joel how to work through the pain barrier.

Joel travels to the most remote islands of the Philippines, where he learns how to free dive.

Joel travels to Steppe of Mongolia to find out if his western workout regime has prepared him.

Joel and Nish travel to China to seek enlightenment, and a beating, from Shaolin Masters.

Joel and Nish meet a shy and humble tribe of long distance runners, known as the Tarahumara.

After ten days of blood, sweat and tears the remaining recruits have reached the final.

Joel takes part in a series of Maasai Warrior trials and sports in Kenya.

The remaining recruits face Tana and Toto, former members of the GIGN.

Joel travels to the most remote islands of the Philippines, where he learns how to free dive.