Season 6

01 Mystery of The Disembodied Feet Episode 127th October 2009 02 Inside LSD Episode 23rd November 2009 03 Secret History of Diamonds Episode 310th November 2009 04 24 Hours After Asteroid Impact Episode 417th November 2009 05 Nazi Mystery: Twins from Brazil Episode 524th November 2009 06 25 Years Episode 819th April 2010 07 Journey to an Alien Moon Episode 920th April 2010 08 Fatal Insomnia Episode 1027th April 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. 09 Talibanistan Episode 118th June 2010 10 Electronic Armageddon Episode 1215th June 2010 11 Inside the DEA Episode 1310th August 2010 12 24 Hours After Hiroshima Episode 1417th August 2010 13 Albino Murders Episode 1524th August 2010 14 Inside Bioterror Episode 1631st August 2010 15 Can the Gulf Survive? Episode 1728th September 2010 16 Lost Mummies of New Guinea Episode 1816th November 2010 17 How Man Tamed the Wild Episode 1923rd November 2010 18 Born to Rage? Episode 2014th December 2010 19 American Hostage Episode 2117th January 2011 20 Lost Cannibals of Europe Episode 2224th January 2011 21 How to Build a Beating Heart Episode 237th February 2011 22 Clash of the Americas Episode 2414th February 2011 23 Finding the Lost da Vinci Episode 2518th March 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. 24 The Man Who Can Fly Episode 2612th February 2012 25 Fighting ISIS Episode 275th March 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.