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Description: Soon after his birth-mother contacted him for the first time, Gary L. Stewart decided to search for his biological father. His disturbing identity would force Stewart to reconsider everything he thought he knew about himself.

Cast:
Self: Gary L. Stewart
Self - Gary's Birth Mother: Jude Gilford
Judy Chandler: Katelyn Kapocsi
Earl Van Best Jr.: Kyle DeCamp
Self - SF Chronicle Reporter 1967-1980: Duffy Jennings
Self - Author: Susan Mustafa
Self - Jude's Sister: Lyn Overton
Self - Co-Author of 'This Is the Zodiac Speaking': David Van Nuys
Self - Gary's Son: Zach Stewart
Self - Gary's Wife: Kristy Stewart
Self - SFPD Homicide Detective 1980-2012: Kelly Carroll
Earl Van Best: Corey Landis
Self - Gary's Mother: Leona Stewart
Self - SFPD Homicide Detective 1972-1999: Frank Falzon
Self - Gary's Sister: Cindy Stewart
Self - Best Family Historian: Hattie Best Polk
Self - Book Editor, The Most Dangerous Animal of All: Michael Signorelli
Self - Jude's Husband: Don Allen
Self - Forensic Document Examiner: Patricia Fisher
Self - SFPD Homicide Inspector 1987-2017: Gianrico Pierucci
Self - Private Investigator: David Fechheimer
Self - SF Examiner Reporter 1961-1977: Lisa Hobbs Birnie
Self - Media Editor, Buzzfeed News: Craig Silverman
Self - Founder of Zodiackillerfacts.com: Michael Butterfield
Self - Gary's Ex-Wife: Cathy Bercegeay Stewart
Self - Founder of Zodiacciphers.com: David Oranchak
Self - SFPD Homicide Detective 1965-1995: Armond Pelissetti
Self - Latent Print Examiner: Glenn Langenburg
Self - Scales Biological Laboratory: George Schiro Jr.
Self - Producer, ABC News: Harry Phillips

Written by: Kief Davidson, Ross M. Dinerstein

Production: Columbia Pictures

Release date: 06 Mar 2020