Every season of This Is the Zodiac Speaking ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of This Is the Zodiac Speaking!

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.

We Called Him Mr. Allen

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.

Are You the Zodiac?

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.

Box of Secrets

In this true-crime docuseries, a family searching for answers shares clues and eye-opening testimonies about the prime suspect in the Zodiac murders.

The Best Seasons of This Is the Zodiac Speaking

The Best Seasons of This Is the Zodiac Speaking

Season 1