For over 50 years, the Zodiac Killer's "340 Cipher" defied the FBI and top cryptographers. In 2020, a team of private citizens claimed a breakthrough, revealing a chilling, narcissistic message. But is it real, or an elaborate hoax playing on our desire for closure?

We walk through the complex decryption process with the solvers themselves, then subject their solution to scrutiny by professional cryptanalysts. The resulting text is disturbing, but the debate it sparks about evidence, obsession, and the true nature of the cipher's "solution" is equally fascinating.

Hosted by Ibnul Jaif Farabi. Produced by Light Knot Studios (lightknotstudios.com).