CALIFORNIA, USA — Netflix's new docuseries "This Is the Zodiac Killer" released Wednesday.
The true-crime series features a family, the Seawaters, as they search for answers and share clues and testimonies about the "prime suspect" in the decades-long serial killer mystery.
The Zodiac Killer killed at least five people in Northern California in 1968 and 1969. The killer sent taunting letters and cryptograms to police and newspapers that included astrological symbols. There are several theories about the killer's identity, but they've never been identified.
Here's what to know about the true-crime docuseries (no spoilers):
Episode Breakdown
1. 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.
2. Are You the Zodiac?
Arthur Leigh 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.
3. 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.
Watch the trailer