5x2 - Congo Bush Pilots

September 16, 2008

5x3 - Secret History of Gold

September 25, 2008

5x4 - Marijuana Nation

October 2, 2008

5x5 - Guns in America

December 9, 2008

5x6 - The Virus Hunters

January 13, 2009

5x7 - Italy's Mystery Mummies

February 3, 2009

5x8 - Monster Fish of the Congo

February 10, 2009

5x9 - Peru's Mass Grave Mystery

February 24, 2009

5x10 - T. Rex Walks Again

March 10, 2009

5x11 - Inside Guantanamo

April 5, 2009

The naval base at Guantanamo Bay secured a place in the annals of history when the first wave of detainees from America's War on Terror – men dubbed "the worst of the worst" – arrived in 2002. The goings-on inside the wire encircling this highly classified camp have been a closely held government secret — until now. National Geographic exclusively captures day-to-day life in the most famous prison in the world.

5x12 - Child Mummy Sacrifice

June 2, 2009

5x13 - Easter Island Underworld

June 9, 2009

5x14 - Inside Death Row

June 12, 2009

5x15 - Inside Guantanamo

September 8, 2009

5x16 - Sex, Lies and Gender

September 15, 2009

5x17 - Chimps on the Edge

September 22, 2009