Season 6

1. Mystery of The Disembodied Feet

2009-10-27 • ? min

2. Inside LSD

2009-11-03 • ? min

3. Secret History of Diamonds

2009-11-10 • ? min

4. 24 Hours After Asteroid Impact

2009-11-17 • ? min

5. Nazi Mystery: Twins from Brazil

2009-11-24 • ? min

8. 25 Years

2010-04-19 • ? min

9. Journey to an Alien Moon

2010-04-20 • ? min

10. Fatal Insomnia

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.

2010-04-27 • ? min

11. Talibanistan

2010-06-08 • ? min

12. Electronic Armageddon

2010-06-15 • ? min

13. Inside the DEA

2010-08-10 • ? min

14. 24 Hours After Hiroshima

2010-08-17 • ? min

15. Albino Murders

2010-08-24 • ? min

16. Inside Bioterror

2010-08-31 • ? min

17. Can the Gulf Survive?

2010-09-28 • ? min

18. Lost Mummies of New Guinea

2010-11-16 • ? min

19. How Man Tamed the Wild

2010-11-23 • ? min

20. Born to Rage?

2010-12-14 • ? min

21. American Hostage

2011-01-17 • ? min

22. Lost Cannibals of Europe

2011-01-24 • ? min

23. How to Build a Beating Heart

2011-02-07 • ? min

24. Clash of the Americas

2011-02-14 • ? min

25. Finding the Lost da Vinci

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.

2012-03-18 • ? min

26. The Man Who Can Fly

2012-02-12 • ? min

27. Fighting ISIS

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.

2016-03-05 • ? min