Gacy

Mark Holton

John Wayne Gacy, Jr.

Adam Baldwin

John Gacy, Sr.

Charlie Weber

Tom Kovacs

Allison Lange

Gretchen

Edith Jefferson

Mother Gacy

Joleen Lutz

Kara Gacy

Scott Allen Henry

Young John Gacy

Kenneth Swartz

Dave

Matt Farnsworth

Stu

Rick Dean

Ray

Glenn Morshower

Ted Boyle

John Laughlin

Det. Kay