On screen
Cast
55 credited performers
Brian Dennehy
John Wayne Gacy
Michael Riley
Joe 'Polock' Kozenczak
Margot Kidder
Rachel Grayson
Meg Foster
Linda Carlson
Martin Julien
Ted Koslo
Scott Hylands
Mike Paxton
John Boylan
Atkins
David Eisner
Williams
Artwork unavailable
Tony De Santis
DeMarco
Mark Humphrey
King
Gary Reineke
Petrie
Tim Progosh
Morris
Artwork unavailable
Danny Pawlick
Santori
Bruce Ramsay
Bragg
Brenda Bazinet
Alice Pearson
Artwork unavailable
Liliane Clune
Marcia Kozenczak
Artwork unavailable
Toby Proctor
Michael Kozenczak
Christopher Marren
Billy
Gerry Quigley
Walden
Nicholas Pasco
Barton
Michael Copeman
Chief Cameron
Artwork unavailable
James Kee
Hoskins
Artwork unavailable
Brigette Lawson
Pam
Jay Brazeau
Jake Burns
Cynthia Preston
Cindy Beck
Andrew Gillies
Vincent Austin
Artwork unavailable
Kurt Reis
Waldron
Artwork unavailable
Judith Goodwin
Mrs. Gant
Shawn Lawrence
Mr. Gant
Artwork unavailable
Jacqueline Graham
Lorna Gant
Artwork unavailable
Nicholas Shields
Christopher Gant
Artwork unavailable
Sarah Gibney
Lisa Kozenczak
Artwork unavailable
Aviva Magner
Debbie Kozenczak
Artwork unavailable
Maureen McRae
Mrs. Trask
Timm Zemanek
Mr. Trask
Maria Ricossa
Helen Gacy
Artwork unavailable
Darryl Palmer
Sheriff
Artwork unavailable
Peter Langley
Mr. Miklovich
John Friesen
Detective #1
Artwork unavailable
Ray Paisley
Illinois K-9 Officer
Brett Halsey
Stan Wilder
Artwork unavailable
Elliott Smith
Gas Station Attendant
Artwork unavailable
David Gardner
Judge
Artwork unavailable
David Bolt
Asst. Principal Burke
Thomas Hauff
Foreman Hendricks
Artwork unavailable
David McAree
Older Worker
Artwork unavailable
J. Winston Carroll
Sergeant on Wabash Ave.
Artwork unavailable
Don Ritchie
Detective on Shakespeare Ave.
Rudy Webb
Cemetery Staffer
Robbie Rox
Cicero Bar Owner
Artwork unavailable
Larry Reynolds
Finger Lake Proprietor
Artwork unavailable
Veliko Pajkovic
Man at Bus Station
Artwork unavailable
John Granik
Narrator (voice)
Luis Guzmán
Waiter (uncredited)
Artwork unavailable
Peter Kerenyi
Pool Player (uncredited)