David Fincher
Director
Jake Gyllenhaal
Robert Graysmith
Mark Ruffalo
Inspector David Toschi
Anthony Edwards
Inspector William Armstrong
Robert Downey Jr.
Paul Avery
Brian Cox
Melvin Belli
John Carroll Lynch
Arthur Leigh Allen
Richmond Arquette
Zodiac 1
Bob Stephenson
Zodiac 3
John Lacy
Zodiac 4
Chloƫ Sevigny
Melanie
Ed Setrakian
Al Hyman
John Getz
Templeton Peck
John Terry
Charles Thieriot
Candy Clark
Carol Fisher
Elias Koteas
Sgt. Jack Mulanax
Dermot Mulroney
Captain Marty Lee
Donal Logue
Captain Ken Narlow
June Diane Raphael
Mrs. Toschi
Ciara Hughes
Darlene Ferrin
Lee Norris
Young Mike Mageau
Patrick Scott Lewis
Bryan Hartnell
Pell James
Cecilia Shepard
Philip Baker Hall
Sherwood Morrill
David Lee Smith
Father
Jason Wiles
Lab Tech Dagitz
Charles Schneider
Cabbie
James Carraway
Shorty
Tom Verica
Jim Dunbar
Jimmi Simpson
Mike Mageau
Doan Ly
Belli's Housekeeper
Karina Logue
Woman
Joel Bissonnette
Inspector Kracke
Zach Grenier
Mel Nicolai
John Mahon
Riverside Captain
Matt Winston
John Allen
Jules Bruff
Catherine Allen
John Ennis
Terry Pascoe
J. Patrick McCormack
Police Commissioner
Adam Goldberg
Duffy Jennings
James Le Gros
Officer George Bawart
Charles Fleischer
Bob Vaughn
Clea DuVall
Linda del Buono
Paul Schulze
Sandy Panzarella
Adam Trese
Detective #1
Penny Wallace
Mulanax's Secretary
John Hemphill
Donald Cheney
Michel Francoeur
Man on Marquee
Thomas Kopache
Copy Editor #1
Barry Livingston
Copy Editor #3
Christopher John Fields
Copy Editor #4
Stanley B. Herman
Staff Editor
Giovanna Spuria
Victim
Hayati Akbas
Hardware Store Customer
Martin Andris
Pedestrian
David Winston Barge
Vallejo Desk Ofiicer
Marlo Bernier
Detective #2
Felix J. Boyle
Airport Passenger
Geoff Callan
Patrolman Zelms
Brad Carr
Camera Man
Cabran E. Chamberlain
Pedestrian
Cookie Crawford
Informant #8
JD Cullum
Director
Rod Damer
FBI Codebreaker
Francois Dominick
Informant #6
Judith Drake
Florence Douglas
Carter Evans
Newscaster #2
Mitchell Fink
Reporter
Erica Ford
Traveler
Ted Garcia
Anchorman #1
Gloria Grant
Bettye Harden
Benjamin Hartnell
Extra
Bryan C. Hartnell
Man in Hallway
Jonathan Hartnell
Extra
Monica Hartnell
Woman in Hallway
Tish Hicks
Informant
Phoebe Holston
Prison Guard
Michael Hungerford
Truck Driver
Janis Jones
Police Receptionist
Roy Lee Jones
Distraught African American Male
Anna Katarina
Society Woman
Barry LeBrock
Reporter
Emily Lineham
Witness
Marty Lodge
Pinole Foreman
Danielle McKee
Prisoner
E.P. McKnight
Informant
Jim McNichols
Bill Hamlet
Cazimir Milostan
Internal Affairs Agent #2
Betty Murphy
Informant
Dave Nemeth
Newscaster #4
Derris Nile
Office Worker
James Joseph O'Neil
DOD Project Leader
Jeff Daniel Phillips
Informant
David Alan Poe
Chronicle Artist
Peter Quartaroli
Patrolman Fouke
Brett Rickaby
Detective Roy
Michael Rose
Navy Project Leader
Jack Samson
Young David Graysmith
John Sarno
Donald Harden
Micah Sauers
David Graysmith
Zachary Sauers
Aaron Graysmith
Bill Seward
TV News Anchor
Matthew Shields
Sheriff's Deputy
Ione Skye
Kathleen Johns
Callie Thompson
Child Witness
Cooper Thornton
Internal Affairs Agent #1
April Vancelette
Witness
Cassius M. Willis
Uniform Cop
Shane Woodson
Informant