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.

Episode 112010-06-08

Talibanistan

No episode overview available.

Episode 122010-06-15

Electronic Armageddon

No episode overview available.

Episode 132010-08-10

Inside the DEA

No episode overview available.

Episode 142010-08-17

24 Hours After Hiroshima

No episode overview available.

Episode 152010-08-24

Albino Murders

No episode overview available.

Episode 162010-08-31

Inside Bioterror

No episode overview available.

Episode 172010-09-28

Can the Gulf Survive?

No episode overview available.

Episode 182010-11-16

Lost Mummies of New Guinea

No episode overview available.

Episode 192010-11-23

How Man Tamed the Wild

No episode overview available.

Episode 202010-12-14

Born to Rage?

No episode overview available.

Episode 212011-01-17

American Hostage

No episode overview available.

Episode 222011-01-24

Lost Cannibals of Europe

No episode overview available.

Episode 232011-02-07

How to Build a Beating Heart

No episode overview available.

Episode 242011-02-14

Clash of the Americas

No episode overview available.

Episode 252012-03-18

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.

Episode 262012-02-12

The Man Who Can Fly

No episode overview available.

Episode 272016-03-05

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.

Season Cast

Featured cast for this season.

Cast

Lisa Ling

Host

Season Media

Posters and videos for this season.

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Posters

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