Cast (30)
Jake Gyllenhaal
Robert Graysmith
Mark Ruffalo
David Toschi
Anthony Edwards
William Armstrong
Robert Downey Jr.
Paul Avery
Chloë Sevigny
Melanie
Elias Koteas
Jack Mulanax
John Carroll Lynch
Arthur Leigh Allen
Brian Cox
Melvin Belli
Dermot Mulroney
Martin Lee
Charles Fleischer
Bob Vaughn
Zach Grenier
Mel Nicolai
Philip Baker Hall
Sherwood Morrill
James LeGros
George Bawart
Donal Logue
Ken Narlow
Richmond Arquette
Zodiac 1 / Zodiac 2
Bob Stephenson
Zodiac 3
John Lacy
Zodiac 4
Ed Setrakian
Al Hyman
John Getz
Templeton Peck
John Terry
Charles Thieriot
Candy Clark
Carol Fisher
June Diane Raphael
Mrs. Toschi
Ciara Hughes
Darlene Ferrin
Lee Norris
Young Mike Mageau
Patrick Scott Lewis
Bryan Hartnell
Pell James
Cecilia Shepard
David Lee Smith
Father
Jason Wiles
Lab Tech Dagitz
Charles Schneider
Cabbie / Paul Stine
James Carraway
Shorty