Sal and Ken investigate San Francisco, the epicenter of the Zodiac Killer murders; the Code Team announces a team member has solved the Zodiac's infamous Z340 code, which has eluded codebreakers for 50 years.
Episode Discussion
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Today a much more believable decryption was all over the news.
So the decryption they came up with in this was just completeley fabricated for the show... going back and freeze framing and reading it shows that, they just put letters wherever they wanted. There are symbols used with different letters all over.