Season 1

Oct. 27, 2024

Bonus Episode 3: Cheri Jo Bates: The Riverside Suspect

A Prime Suspect, Decades of Questions, and a Trail Gone Cold
Oct. 27, 2024

23: The Z340 Cipher: Finally Cracked

Breaking a 51-Year-Old Mystery
Oct. 27, 2024

11: The Beach Murders: Domingos, Edwards, & The Swindles

Unsolved Crimes That Preceded the Zodiac's Reign
Oct. 27, 2024

21: Ross Sullivan: The Library Suspect

A Troubled Life Intertwined with Zodiac Theories
Oct. 27, 2024

14: Arthur Leigh Allen, Part 1

The Suspect Who Almost Fit the Puzzle
Oct. 27, 2024

2: The Attack on Darlene Ferrin & Michael Mageau

A Deadly Encounter at Blue Rock Springs
Oct. 27, 2024

19: New York Zodiac Copycat, Part 2

Justice Catches Up to the Copycat"
Oct. 27, 2024

Bonus Episode 4: April 1978 & The Toschi Scandal

The Comeback Letter that Sparked Doubt
Oct. 27, 2024

7: The Letters and the 340 Cipher

Taunting the World Through Codes and Threats
Oct. 27, 2024

4: The Attack at Lake Berryessa

Terror on a Tranquil Shoreline
Oct. 27, 2024

12: The Final Zodiac Letters

1971-1974: The Killer's Eerie Last Words
Oct. 27, 2024

15: Arthur Leigh Allen, Part 2

Evidence, Arrests, and the Search for Truth
Oct. 27, 2024

10: Ray Davis: The 1962 Cab Murder

Was the Zodiac Killer’s First Victim Found in Oceanside?
Oct. 27, 2024

Bonus 1: Melvin Belli, Please Help Me

The Zodiac’s Plea for Help and a Twisted Game of Manipulation
Oct. 27, 2024

16: Richard 'Rick' Marshall: Another Zodiac Suspect

The Ham Radio Enthusiast Turned Person of Interest
Oct. 27, 2024

18: New York Zodiac Copycat, Part 1

When Fantasy Turns Deadly
Oct. 27, 2024

1: The Murders of Betty Lou Jensen & David Faraday

The First Strike of a Notorious Serial Killer
Oct. 27, 2024

6: The Paul Stine Cab Murder

A Killer Takes a Risk in San Francisco
Oct. 27, 2024

9: The Disappearance of Donna Lass

Vanished Without a Trace at Lake Tahoe
Oct. 27, 2024

8: Cheri Jo Bates: A Connection to the Zodiac?

Tracing the Clues of a Brutal 1966 Murder
Oct. 27, 2024

5: The Story of Bryan Hartnell

Surviving the Zodiac's Brutal Daylight Attack
Oct. 27, 2024

Bonus 2: Cheri Jo Bates & The Hoax Letters

When Pranks Turn Deadly Serious
Oct. 27, 2024

17: Richard Gaikowski: The Journalist Suspect

A Name That Won't Fade Away
Oct. 27, 2024

3: The First Letters and the 408 Cipher

When a Killer Speaks in Code