The Hunt for the Zodiac Killer (2017)
S1E2 The Military Connection
Episode Overview
Title: The Military Link Plot: As the investigation progresses, the team discovers that the Zodiac Killer might have a military background. Their advanced supercomputer detects unusual symbols within the killer's ciphers, which were likely familiar to only a select group at the time. Meanwhile, Sal and Ken stumble upon fresh leads that could bring them closer to identifying the elusive murderer.
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S1