Barbara Van Tomme	Self - College Librarian
Bob Cosley	Self - El Dorado County District Attorney
Cameron Morris	Self - Park Ranger
Chris Christensen	Self - Bomb Squad Expert
Craig P. Bauer	Self - NSA Fellow
David Oranchak	Self - Zodiac Cipher Expert
Ed Rust	Self - Retired Vallejo Police Officer
Ed Scheidt	Self - Chairman, CIA Cryptographic Center (Retired)
Eileen Page	Self - Handwriting Consultant
Gary Michael	Self - Former Booz Allen Hamilton Employee

Jackie Hickey	Self - Bomb Squad Expert
Jake Herminghaus	Self - Detective, South Lake Tahoe Police Dept
Jason Wolf	Self - Executive Producer, The Hunt for the Zodiac Killer
Jim Simons	Self - Riverside PD
Jody Johns	Self - Daughter of Kathleen Johns
John Averitt	Self - Police Psychologist
John Bennett	Self - Special Agent in Charge, FBI
John Burke	Self - Ret. Albany Detective
Josiah Jones	Self - Albany PD Detective
Ken Fowler	Self - Radio Expert
Ken Mains	Self - Cold Case Expert
Kevin Knight	Self - Artificial Intelligence , USC
Larry Loew	Self - Friend of Donna Lass
Marin Pilloud	Self - Forensic Anthropologist
Misty Johansen	Self - Zodiac Historian
Mocean Melvin	Self - Narrator
Nico Birnbaum	Sujith Ravi
Pamela Hofsass	Self - Director, Forensic Services Division, Contra Costa County
Patrick Collins	Self - Nephew of Investigative Reporter Dave Peterson
Roger Pierson	Self - Lamplighter Performer 1968 - 2002
Ryan Garlick	Self - Professor of Computer Science
Sal LaBarbera	Self - Homicide Detective
Sergio G. Diaz	Self - Chief of Police, Riverside PD
Steve Shumway	Self - Retired Homicide Detective
Sujith Ravi	Self - Computer Engineer, Google
Suzanna Ryan	Self - Forensic Serologist, AISOCC
Taylor Berg-Kilpatrick	Self - Professor of Computer Science, Carnegie Mellon University
Tom Bruton	Self - San Francisco PD (Retired)

Case Closed egyéb:

Case Closed