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Unbreakable Codes
There's nothing more fascinating than a code that can't be cracked. For centuries, mankind has devised ingenious ways to hide valuable information using everything from enigmatic puzzles, to complex ciphers and secret symbols. If history's unbreakable codes can be deciphered, could we unlock answers to some of the greatest mysteries of both the past and present?
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Other episodes for this season
![The World Beneath Our Feet](https://image.tmdb.org/t/p/w300/7I93aqa3q01ywKFncUz9Iiw9zVd.jpg)
![The Time Travelers](https://image.tmdb.org/t/p/w300/4WYK3hZzajRnraSR0tsRno0Y11.jpg)
![Secrets of Ancient Structures](https://image.tmdb.org/t/p/w300/uoFtsH8tMYVgQx5C0KCHIVqHfVV.jpg)
![Mysteries of the Vikings](https://image.tmdb.org/t/p/w300/ukcRr2Lf7lsapFi93noRGqGAmMR.jpg)
![Strange Stories of the Presidents](https://image.tmdb.org/t/p/w300/4SzUQZKlep2dPXMxdcH9Kmtp3Bo.jpg)
![Bizarre Afflictions](https://image.tmdb.org/t/p/w300/744xzl1UnX1jR0YD8wyiwgbRJd3.jpg)
![Strange Technology](https://image.tmdb.org/t/p/w300/wAK8AfaWTAeCXibYsGl8tg5qu9c.jpg)
![Unbreakable Codes](https://image.tmdb.org/t/p/w300/f6JkRsgc6GHN1J7yL4ZSk1fBDXU.jpg)
![Strange Stories of World War II](https://image.tmdb.org/t/p/w300/ythTNCIk4jUegUol8nfiXtkDJrG.jpg)
![Monsters Among Us](https://image.tmdb.org/t/p/w300/ythTNCIk4jUegUol8nfiXtkDJrG.jpg)