E1 - Mystery of The Disembodied Feet

Aired: October 27, 2009

E2 - Inside LSD

Aired: November 03, 2009

E3 - Secret History of Diamonds

Aired: November 10, 2009

E4 - 24 Hours After Asteroid Impact

Aired: November 17, 2009

E5 - Nazi Mystery: Twins from Brazil

Aired: November 24, 2009

E8 - 25 Years

Aired: April 19, 2010

E9 - Journey to an Alien Moon

Aired: April 20, 2010

E10 - Fatal Insomnia

Aired: April 27, 2010

An extremely rare genetic disease passed down through generations, fatal familial insomnia's (FFI) primary symptom is sleeplessness, but with a fatal twist: victims are dead within months. National Geographic delves into the science of sleep to find out why we need sleep and what happens to us when we don't get it. Witness the pioneering research inside the sleeping brain as well as the mind forbidden to rest for days at a time.

E11 - Talibanistan

Aired: June 08, 2010

E12 - Electronic Armageddon

Aired: June 15, 2010

E13 - Inside the DEA

Aired: August 10, 2010

E14 - 24 Hours After Hiroshima

Aired: August 17, 2010

E15 - Albino Murders

Aired: August 24, 2010

E16 - Inside Bioterror

Aired: August 31, 2010

E17 - Can the Gulf Survive?

Aired: September 28, 2010

E18 - Lost Mummies of New Guinea

Aired: November 16, 2010

E19 - How Man Tamed the Wild

Aired: November 23, 2010

E20 - Born to Rage?

Aired: December 14, 2010

E21 - American Hostage

Aired: January 17, 2011

E22 - Lost Cannibals of Europe

Aired: January 24, 2011

E23 - How to Build a Beating Heart

Aired: February 07, 2011

E24 - Clash of the Americas

Aired: February 14, 2011

E25 - Finding the Lost da Vinci

Aired: March 18, 2012

Leonardo da Vinci's "The Battle of Anghiari" vanished 500 years ago, with only copies rendered by other artists left behind to confirm its existence. Scientist and art enthusiast Maurizio Seracini, has dedicated 36 years to tracking down the missing mural, and seems to be on the verge of uncovering the hidden fresco behind the walls of the Palazzo Vecchio in Florence, Italy.

E26 - The Man Who Can Fly

Aired: February 12, 2012

E27 - Fighting ISIS

Aired: March 05, 2016

National Geographic writer Neil Shea travels to the heart of Kurdistan on a quest to meet the Kurdish fighters on the front lines against the world's biggest terrorist threat, ISIS.