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On the show
Recent episodes
S4E20 - Marvin Margolis
Dec 24, 2025
11m 21s
S4E19 - The Joe Green / Josef Mengele Conspiracy
Feb 15, 2023
10m 23s
S4E18 - Paul Doerr
Nov 4, 2022
11m 01s
S4E17 - Suspect - Earl Van Best
Apr 19, 2022
4m 02s
S4E16 - Suspect - Richard Gaikowski Part 2
Apr 12, 2022
11m 05s
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| Date | Episode | Topics | Guests | Brands | Places | Keywords | Sponsor | Length | |
|---|---|---|---|---|---|---|---|---|---|
| 12/24/25 | S4E20 - Marvin Margolis✨ | — | — | — | — | — | — | 11m 21s | |
| 2/15/23 |  S4E19 - The Joe Green / Josef Mengele Conspiracy✨ | conspiracyhistory+1 | — | — | — | ZodiacMengele+1 | — | 10m 23s | |
| 11/4/22 |  S4E18 - Paul Doerr✨ | — | — | — | — | — | — | 11m 01s | |
| 4/19/22 | S4E17 - Suspect - Earl Van Best✨ | Earl Van Bestsuspect+1 | — | S4E17 | — | Zodiac casetrue crime+1 | — | 4m 02s | |
| 4/12/22 | S4E16 - Suspect - Richard Gaikowski Part 2✨ | zodiacmurder+5 | — | — | — | — | — | 11m 05s | |
| 4/6/22 | S4E15 - Suspect - Richard Gaikowski✨ | true crimesuspects+1 | — | S4E15 | — | Zodiac KillerRichard Gaikowski+1 | — | 10m 18s | |
| 3/30/22 | S4E14 - Suspect: Bruce Davis✨ | Bruce DavisZodiac Killer+2 | — | The Clarksvillian | — | H. Allegra LansingEric Fisher+1 | — | 7m 22s | |
| 3/22/22 | S4E13 - Suspect - Edward Wayne Edwards✨ | true crimemurder+2 | — | Rolling Stone | — | edwardwayneedwardsbayarea | — | 9m 44s | |
| 3/14/22 | S4E12 - Suspect - Arthur Leigh Allen: Part 2✨ | Arthur Leigh AllenZodiac Killer+1 | — | — | — | Zodiacmystery+1 | — | 11m 09s | |
| 3/8/22 | S4E11 - Suspect - Arthur Leigh Allen (Part 1)✨ | zodiacmurder+5 | — | Zodiackiller.com | — | — | — | 12m 25s | |
Want analysis for the episodes below?Free for Pro Submit a request, we'll have your selected episodes analyzed within an hour. Free, at no cost to you, for Pro users. | |||||||||
| 2/28/22 |  S4E10 - Suspect: Lawrence Kane | Episode Notes Zodiac Suspect Lawrence Kane on ZodiacKiller.com Lawrence Kane on Zodiacciphers.com murder #history #bayarea #truecrime #lawrencekane Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 2/23/22 |  S4E9 - Introduction to the Suspects | Episode Notes You can find a very good introduction to the frequently referenced Big Four suspects at https://zodiackiller.com/zodiac-killer-suspects/ truecrime #history #zodiac #zodiacspeaking #murder #bayarea Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 11/15/21 | S4E8 - Zodiac by David Fincher | No description provided. | — | ||||||
| 10/6/21 | S4E7 - Gary Francis Poste - Potential Zodiac | Episode Notes The Case Breakers press release - https://secureservercdn.net/166.62.114.250/g9q.07b.myftpupload.com/wp-content/uploads/2021/09/Zodiac-Killer-Press-release-1-1.pdf Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 9/9/21 | S4E6 - Zodiac by Robert Graysmith | Episode Notes truecrimie murder zodiac history robertgraysmith book literature bayarea Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 5/15/21 | S4E5 - The Great Unsolved Mysteries | No description provided. | — | ||||||
| 5/1/21 | S4E4 - The California Crime Book by Robert Colby | Episode Notes Sponsored by Military True Crime Addict! Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 4/19/21 | S4E3 - Dirty Harry - 1972 | Episode Notes The Dirty Harry Wiki! Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 4/5/21 | S4E2 - Zodiac & Porn | Episode Notes Yes, it exists. Yes, you can find the film on various porn sites. No, I'm not going to link it! Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 4/1/21 |  S4E1 - The Zodiac Killer - 1971 | Episode Notes The Zodiac KIller - 1971 Directed & Produced by Tom Hanson Written by Ray Cantrell Manny Cardoza Starring Hal Reed Bob Jones Ray Lynch Tom Pittman Currently Available on YouTube Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 3/27/21 |  S3E3 - The 340 Cipher | Episode Notes We look at the 340 Cipher. An excellent post on the 340 that served as the basis of this episode. Follow our new Instagram - ZodiacSpeakingPodcast Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 8/10/20 | S3E2 - Episode 26 - The 408 Cipher | Episode Notes A look at the 408 Cipher, what it took, and how it all might be saying more. Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 7/29/20 | S3E1 - Episode 25 - Intro to Ciphers | Episode Notes We're doing a short, 4 episode season specifically on the Ciphers before Season 4, all about the suspects. In this introduction, we look at the basics of what a cipher is, how they can be abused, and the barebones of why it matters. Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 5/5/20 | S2E5 - Kathleen Johns | Episode Notes Kathleen Johns, who sadly passed away in 2002, was abducted while on Highway 132 heading from San Bernadino to Petaluma. WAs it Zodiac? She thought so. Find out more at https://zodiac-speaking.pinecast.co | — | ||||||
| 5/20/19 |  S2E1 - Cheri Jo Bates | Was this murder in Riverside related? Is Bates the model for so many murder victims in popular culture? Did Zodiac do it? The first part of three. | — | ||||||
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