Adam Goldberg
|
Duffy Jennings
|
Adam Trese
|
Detective #1
|
Anthony Edwards
|
Inspector William Armstrong
|
April Vancelette
|
Witness (uncredited)
|
Barry Livingston
|
Copy Editor #3
|
Benjamin Hartnell
|
Extra (unconfirmed) (uncredited)
|
Betty Murphy
|
Informant (uncredited)
|
Bill Seward
|
TV News Anchor (uncredited)
|
Bob Stephenson
|
Zodiac 3
|
Brad Carr
|
Camera Man (uncredited)
|
Brett Rickaby
|
Detective Roy (uncredited)
|
Brian Cox
|
Melvin Belli
|
Bryan C. Hartnell
|
Man in Hallway (uncredited)
|
Cabran E. Chamberlain
|
Pedestrian (uncredited)
|
Callie Thompson
|
Child Witness (uncredited)
|
Candy Clark
|
Carol Fisher
|
Cassius Willis
|
Uniform Cop (uncredited)
|
Charles Fleischer
|
Bob Vaughn
|
Charles Schneider
|
Cabbie / Paul Stine
|
Chloë Sevigny
|
Melanie
|
Christopher John Fields
|
Copy Editor #4 (as Christopher Fields)
|
Ciara Hughes
|
Darlene Ferrin
|
Clea DuVall
|
Linda del Buono (as Clea Duvall)
|
Danielle McKee
|
Prisioner (uncredited)
|
David Alan Hodges
|
Chronicle Artist (uncredited)
|
David Lee Smith
|
Father
|
David Winston Barge
|
Vallejo Desk Ofiicer (uncredited)
|
Dermot Mulroney
|
Captain Marty Lee
|
Derris Nile
|
Office worker (uncredited)
|
Doan Ly
|
Belli's Housekeeper
|
Donal Logue
|
Captain Ken Narlow
|
Ed Setrakian
|
Al Hyman
|
Elias Koteas
|
Sgt. Jack Mulanax
|
Emal François Dominick
|
Informant #6 (uncredited)
|
Erica Ford
|
Traveler (uncredited)
|
Felix J. Boyle
|
Airport Passenger (uncredited)
|
Geoff Callan
|
Patrolman Zelms (uncredited)
|
Ione Skye
|
Kathleen Johns (uncredited)
|
Jack Samson
|
Young David Graysmith (uncredited)
|
Jake Gyllenhaal
|
Robert Graysmith
|
James Carraway
|
Shorty
|
James Joseph O'Neil
|
DOD Project Leader (uncredited)
|
James LeGros
|
Officer George Bawart (as James Le Gros)
|
Janis Jones
|
Police Receptionist (uncredited)
|
Jason Wiles
|
Lab Tech Dagitz
|
Jeffrey Daniel Phillips
|
Informant (uncredited)
|
Jimmi Simpson
|
Mike Mageau
|
Joel Bissonnette
|
Inspector Kracke
|
John Carroll Lynch
|
Arthur Leigh Allen
|
John Ennis
|
Terry Pascoe
|
John Getz
|
Templeton Peck
|
John Hemphill
|
Donald Cheney
|
John Lacy
|
Zodiac 4
|
John Mahon
|
Riverside Captain
|
John Terry
|
Charles Thieriot
|
Jonathan Hartnell
|
Extra (unconfirmed) (uncredited)
|
J. Patrick McCormack
|
Police Commissioner
|
Jules Bruff
|
Catherine Allen
|
June Diane Raphael
|
Mrs. Toschi (as June Raphael)
|
Karina Logue
|
Woman
|
Lee Norris
|
Young Mike Mageau
|
Mark Ruffalo
|
Inspector David Toschi
|
Martin Andris
|
Pedestrian (uncredited)
|
Matt Winston
|
John Allen
|
Micah Sauers
|
David Graysmith (uncredited)
|
Michel Francoeur
|
Man on Marquee
|
Mitchell Fink
|
Reporter (uncredited)
|
Monica Hartnell
|
Woman in Hallway (uncredited)
|
Patrick Scott Lewis
|
Bryan Hartnell
|
Paul Schulze
|
Sandy Panzarella
|
Pell James
|
Cecilia Shepard
|
Penny Wallace
|
Mulanax's Secretary
|
Peter Quartaroli
|
Patrolman Fouke (uncredited)
|
Philip Baker Hall
|
Sherwood Morrill
|
Richmond Arquette
|
Zodiac 1 / Zodiac 2
|
Robert Downey Jr.
|
Paul Avery
|
Rod Damer
|
FBI Codebreaker (uncredited)
|
Shane Woodson
|
Informant (uncredited)
|
Thomas Kopache
|
Copy Editor #1
|
Tish Hicks
|
Informant (uncredited)
|
Tom Verica
|
Jim Dunbar
|
Zachary Sauers
|
Aaron Graysmith (uncredited)
|
Zach Grenier
|
Mel Nicolai
|