#1
S1E2
Are You the Zodiac?
Allen and the Seawaters lose touch after a trip to a college town, where a student is found slain. Years later, their ailing mentor reveals a dark secret.
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#2
S1E1
We Called Him Mr. Allen
The Seawaters reflect on a beloved teacher who entered their lives in 1961. As the Zodiac Killer's reign of terror unfolds, a shocking suspect emerges.
#3
S1E3
Box of Secrets
As the siblings grapple with the true nature of their mother's bond with Allen, a peculiar gift and a box of clues bring them closer to the truth.
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