Ed Stafford undertakes an extreme survival challenge as he washes up naked and alone on a desert island, Olorua, south east of Fiji. He has only his brain, bare hands and a camera to keep him alive.

Business Insider spoke with the first man to walk the length of the Amazon river and Discovery channel host, Ed Stafford, about what to do if you find yourself stranded in the middle of nowhere.

Dropped on Panama's Pacific Coast, Ed faces a gruelling 10-day hike through the Darien Gap. Can he tackle one of the world's most perilous expanses of jungle?(S01,E06 ...