S04 Episode 1
Arctic Circle
Wed, 12 Aug 2009
S04 Episode 2
Alabama
Wed, 19 Aug 2009
S04 Episode 3
Vietnam
Wed, 26 Aug 2009
S04 Episode 4
Texas
Wed, 2 Sep 2009
S04 Episode 5
Alaska
Wed, 9 Sep 2009
S04 Episode 6
Pacific Island
Wed, 6 Jan 2010
S04 Episode 7
China
Wed, 13 Jan 2010
S04 Episode 8
Big Sky Country
Wed, 20 Jan 2010
S04 Episode 9
Guatemala
Tue, 26 Jan 2010
S04 Episode 10
Urban Survivor
Wed, 3 Feb 2010
S04 Episode 11
North Africa
Wed, 17 Feb 2010