In this episode, we discover the mystery of Cicada 3301. Cicada 3301 all started from a post on the message board 4chan, and led Cryptographers on a chase for about a month through some of the world's most complicated and interesting puzzles, until a few managed to get to the end. Then, it returned for two more years, finally with an encoded book that is, at the time of the release of this episode, unsolved. We're sorry, the song mentioned in the episode and supposedly played in the episode d...