Mark Holton
John Wayne Gacy, Jr.
Acting
Adam Baldwin
John Gacy, Sr.
Acting
Charlie Weber
Tom Kovacs
Acting
Allison Lange
Gretchen
Acting
Edith Jefferson
Mother Gacy
Acting
Joleen Lutz
Kara Gacy
Acting
Scott Allen Henry
Young John Gacy
Acting
Kenneth Swartz
Dave
Acting
Matt Farnsworth
Stu
Acting
Rick Dean
Ray
Acting
Glenn Morshower
Ted Boyle
Acting
John Laughlin
Det. Kay
Acting