Adventurer Bear Grylls returns in a new seven-part series, travelling to some of the world's most inhospitable environments to tackle extreme survival challenges and show how to get out alive. Each week presents new challenges, ranging from the Skeleton Coast of Namibia to the rapids in Zambia, and from the boulder-strewn desert canyons of Mexico's Baja Peninsula to the deadly swamps of Louisiana. The series also includes a two-part journey through the Pacific 'Ring of Fire' - from a desert island in Sumatra to tropical storms in Indonesia - and a journey in the Andean Steppes. In such challenging environments, having the right skills and knowledge can mean the difference between life and death, and Bear demonstrates techniques used by the military as well as those practised by indigenous peoples. And you can bet he'll utilise his urine in an imaginative way at some stage.  In the first programme of the series, Bear travels in Namibia, one of the hottest and emptiest places on Earth.