Six scientists arrive at the creepy Headstone Manor to investigate a strange phenomena which was the site of a mysterious massacre years earlier where 18 guests were killed in one night. It turns out that the house is the place of a satanic cult lead by a sinister monk who plans to kill the scientists who are inhabiting this house of Satan.
| Directing | Ray Cameron | Director |
| Writing | Ray Cameron | Writer |
| Production | Ray Cameron | Producer |
| Production | John Downes | Co-Producer |
| Production | Stuart D. Donaldson | Executive Producer |
| Production | Laurence Myers | Executive Producer |
| Sound | Mark London | Original Music Composer |
| Sound | Mike Moran | Original Music Composer |
| Camera | Dusty Miller | Director of Photography |
| Camera | Brian West | Director of Photography |
| Editing | Brian Tagg | Editor |
| Production | Sue Whatmough | Casting |
| Writing | Barry Cryer | Writer |
| Art | John Sunderland | Art Direction |
| Directing | Ken Baker | Assistant Director |
| Directing | Peter Bennett | Second Assistant Director |
| Directing | Paul Taylor | Third Assistant Director |
| Camera | John Maskall | Camera Operator |
| Camera | John Ignatius | Focus Puller |
| Camera | Peter Turner | Clapper Loader |
| Camera | Nick Pearson | Grip |
| Sound | Chris Munro | Sound Recordist |
| Sound | John Stevenson | Boom Operator |
| Directing | Cheryl Lea | Continuity |
| Production | Monica Rogers | Production Coordinator |
| Editing | Judy Summers | First Assistant Editor |
| Editing | David M. Bosley | Assistant Editor |
| Sound | Marcus Thompson | Sound Editor |
| Sound | Andy Nelson | Sound Editor |
| Lighting | George Boner | Gaffer |
| Lighting | John Rogers | Best Boy Electric |
| Lighting | Ron Holmwood | Electrician |
| Costume & Make-Up | Eric Allwright | Makeup Artist |
| Costume & Make-Up | Elaine Bowerbank | Hairdresser |
| Costume & Make-Up | Paul Vachon | Wardrobe Master |
| Costume & Make-Up | Jill Dodds | Wardrobe Assistant |
| Art | Heather Armitage | Assistant Art Director |
| Art | Dennis Fruin | Property Master |
| Production | Ray Tranter | Production Accountant |
| Production | Jo Hallam | Assistant Accountant |
| Camera | David Farrell | Still Photographer |
| Production | Lynda Levy | Publicist |
| Art | Bob Cross | Construction Manager |
