Robert Graysmith
David Toschi
William Armstrong
Paul Avery
Melanie
Jack Mulanax
Arthur Leigh Allen
Melvin Belli
Martin Lee
Bob Vaughn
Mel Nicolai
Sherwood Morrill
George Bawart
Ken Narlow
Zodiac 1 / Zodiac 2
Zodiac 3
Zodiac 4
Al Hyman
Templeton Peck
Charles Thieriot
Carol Fisher
Mrs. Toschi
Darlene Ferrin
Young Mike Mageau
Bryan Hartnell
Cecilia Shepard
Father
Lab Tech Dagitz
Cabbie / Paul Stine
Shorty
Jim Dunbar
Mike Mageau
Belli's Housekeeper
Woman
Inspector Kracke
Riverside Captain
John Allen
Catherine Allen
Terry Pascoe
Police Commissioner
Duffy Jennings
Linda del Buono
Sandy Panzarella
Detective #1
Mulanax's Secretary
Donald Cheney
Man on Marquee
Copy Editor #1
Copy Editor #3
Copy Editor #4
Young David Graysmith
David Graysmith
Aaron Graysmith
Margot Graysmith
Patrolman Fouke
Patrolman Zelms
Truck Driver
Society Woman
Informant (Hall of Justice A)
Informant
Informant #8
Uniform Cop
Florence Douglas
Prison Guard
Pinole Foreman
Internal Affairs Agent #1
Internal Affairs Agent #2
Kathleen Johns' baby
Director
Staff Editor
Distraught African American Male
Navy Project Leader
DOD Project Leader
FBI Codebreaker
Donald Harden
Bettye Harden
Detective Roy
Detective #2
Newscaster #2
TV News Anchor
Newscaster #4
Anchorman #1
Interviewer #1
Reporter
Kathleen Johns (uncredited)
Vallejo Desk Ofiicer (uncredited)
Hardware Store Customer (uncredited)
Camera Man (uncredited)
Reporter (uncredited)
Traveler (uncredited)
Informant (uncredited)
Prisoner (uncredited)
Office Worker (uncredited)
Janie (uncredited)
Child Witness (uncredited)
Patrolman (uncredited)