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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.
Stars:
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Other episodes for this season
![Mystery of The Disembodied Feet](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Inside LSD](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Secret History of Diamonds](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![24 Hours After Asteroid Impact](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Nazi Mystery: Twins from Brazil](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![25 Years](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Journey to an Alien Moon](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Fatal Insomnia](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Talibanistan](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Electronic Armageddon](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Inside the DEA](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![24 Hours After Hiroshima](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Albino Murders](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Inside Bioterror](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Can the Gulf Survive?](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Lost Mummies of New Guinea](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![How Man Tamed the Wild](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Born to Rage?](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![American Hostage](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Lost Cannibals of Europe](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![How to Build a Beating Heart](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Clash of the Americas](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Finding the Lost da Vinci](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![The Man Who Can Fly](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)
![Fighting ISIS](https://image.tmdb.org/t/p/w300/ovp1NsdV9G3MFbhxZaASMWWNQtd.jpg)