For much of recorded history, humans beings have been trying to devise unbreakable codes (and break the codes of their rivals). But is there any truly unbreakable code? And what exactly is Cicada 3301? Tune in to learn more.
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CLASSIC: The Hidden History of Assassins, Chapter Two: The Modern Day
53:23

CLASSIC: The Hidden History of Assassins, Chapter One: An Origin Story
1:00:19

The Legacy Program, Chapter Two: How Aliens (Could) Work
58:31