 | 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 |
| Directing | |
| Clive Saunders | Director |
Writing | |
| David Birke | Writer |
