4 - 1Arctic Circle Aug. 12, 2009
4 - 2Alabama Aug. 19, 2009
4 - 3Vietnam Aug. 26, 2009
4 - 4Texas Sep. 02, 2009
4 - 5Alaska Sep. 09, 2009
4 - 6Pacific Island Jan. 06, 2010
4 - 7China Jan. 13, 2010
4 - 8Big Sky Country Jan. 20, 2010
4 - 9Guatemala Jan. 26, 2010
4 - 10Urban Survivor Feb. 03, 2010
4 - 11North Africa Feb. 17, 2010- 4 - 12Episode 12 Jun. 08, 2025
- 4 - 13Episode 13 Jun. 08, 2025