Season 1

10 episodes · Apr 6, 2005

Les faces an extraordinary challenge in season one: a relentless week spent battling some of Earth’s most extreme environments. From the sweltering heat of the Costa Rican jungle to the biting cold of the Arctic Circle, he then endures the parched expanse of the Sonora Desert bef…

Season 2

7 episodes · Aug 15, 2007 · 7.5

Season 3

6 episodes · Nov 7, 2008

Season 4

7 episodes · Jun 30, 2012

Season 5

8 episodes · Jan 1, 2014

Season 6

7 episodes · Apr 1, 2015

Season 7

7 episodes · Nov 7, 2015

Season 8

2 episodes · Jun 19, 2016