I thought the short film was pretty good in showing people what the real life characters had to do while solving the Z408 cipher back in 1969. There were some continunity errors but it is still passable and it's a great short overall!
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The Salinas Decoder
It is August 8th, 1969 and a teacher from North Salinas High School, along with his wife solve one of the ciphers sent to San Francisco Chronicles by the Zodiac Killer, not realizing they turned him into a legend.