Robert Graysmith

Himself - Author of 'Zodiac' and 'Zodiac Unmasked'

Arthur Spinelli

Himself - Former Solano County Saloon Owner

Donald Cheney

Himself - Former Friend of Arthur Leigh Allen

Sandy Panzarella

Himself - Friend of Donald Cheney & Acquaintance of Arthur Leigh Allen

Norman Boudreau

Himself - College Friend of Arthur Leigh Allen

George Bawart

Himself - Vallejo Police Dept (Ret)

Sharon Pagaling Hagon

Herself - Criminal Profiler

Donald Fouke

Himself - San Francisco Police Dept (Ret)

David Slaight

Himself - Napa County Sheriff Dept (Ret)

Nancy Slover

Herself - City of Vallejo '355' Operator

Kim Rossmo

Himself - Research Professor, Department of Criminal Justice, Texas State University

David Prior