| 角色 | 饰演者 | 角色介绍 |
| Derek/Robert | 彼得·杰克逊 | |
| Ozzy/3rd Class Alien | Terry Potter | |
| Barry/3rd Class Alien | Pete O'Herne | |
| Giles/3rd Class Alien | Craig Smith | |
| Frank/3rd Class Alien | Mike Minett | |
| Lord Crumb | Doug Wren | |
| Lord Crumb SPFX Double/3rd Class Alien | Dean Lawrie | |
| Lord Crumb's Voice | Peter Vere-Jones | |
| 3rd Class Alien | Ken Hammon | |
| 3rd Class Alien | Robin Griggs | |
| 3rd Class Alien | Michael Gooch | |
| 3rd Class Alien | Peter Gooch | |
| 3rd Class Alien | Laurie Yarrall | |
| 3rd Class Alien | Shane Yarrall | |
| 3rd Class Alien | Philip Lamey | |
| 3rd Class Alien | Costa Botes | |
| 3rd Class Alien | Graham Butcher | |
| 3rd Class Alien | Bob Haliburton | |
| 3rd Class Alien | Andrew McKay | |
| 3rd Class Alien | Clive Haywood | |
| 3rd Class Alien | John McTavish | |
| 3rd Class Alien | Graham Nesbitt | |
| 3rd Class Alien | Steven Smith | |
| 3rd Class Alien | John Logan Jr. | |
| 3rd Class Alien | Matt Noonan | |
| 3rd Class Alien | Cameron Chittock | |
| 3rd Class Alien | Ray Battersby | |
| 3rd Class Alien | Mike Appleby | |
| 3rd Class Alien | Peter Appleby | |
| 3rd Class Alien | Mike Kane | |
| 3rd Class Alien | Robert Johnston | |
| 3rd Class Alien | Scott Bradshaw |
