| 角色 | 饰演者 | 角色介绍 |
| John Wayne Gacy | 威廉·弗西斯
 | |
| Victim | 理查德·哈蒙
 | |
| Glen Phillips | Patrick Gilmore | |
| Attractive Girl | Andrea Brooks | |
| Jason Moss | Jesse Moss | |
| Diego | Jeffrey Bowyer-Chapman | |
| Alyssa | Emma Lahana | |
| Professor Harris | Andrew Airlie | |
| Amy | Karissa Tynes | |
| Marcus | Brett Dier | |
| Alex Moss | Cole Heppell | |
| FBI Agent | Mike Kopsa | |
| Stan | Eric Keenleyside
 | |
| Thompson | Daryl Shuttleworth | |
| Autumn | Michaela Mann | |
| Mike | Jaren Brandt Bartlett | |
| Valerie | Belinda Metz | |
| Armed Gaurd | James Ralph | |
| Paul | Anthony Shim | |
| Bobby | Kai Kennedy | |
| Frank | Michael Ryan | |
| Tim Carsey | Hunter Elliott | |
| Undercover Detective | John Andrew Vaas | |
| Marcus' friend | Josh Goring | |
