| Person | Type | Job | Role(s) |
|---|---|---|---|
 Derek Barrington | Crew | Art | Art Direction |
Gerry Levy | Crew | Production | Associate Producer |
 H.P. Lovecraft | Crew | Writing | Novel |
Henry Lincoln | Crew | Writing | Screenplay |
Howard Lanning | Crew | Editing | Editor |
Jerry Sohl | Crew | Writing | Story |
John Coquillon | Crew | Camera | Director of Photography |
Louis M. Heyward | Crew | Production | Producer |
Mervyn Haisman | Crew | Writing | Screenplay |
Michael Southgate | Crew | Costume & Make-Up | Costume Design |
Peter Knight | Crew | Sound | Original Music Composer |
Tony Tenser | Crew | Production | Executive Producer |
 Vernon Sewell | Crew | Directing | Director |
 Barbara Steele | Cast | Actress | Lavinia Morley |
 Boris Karloff | Cast | Actor | Professor John Marsh |
Carol Anne | Cast | 1st Virgin (uncredited) | |
 Christopher Lee | Cast | Actor | J.D. Morley |
Denys Peck | Cast | Peter Manning (uncredited) | |
Derek Tansley | Cast | Actor | Judge (uncredited) |
Douglas Mitchell | Cast | Actor | 2nd Car-Chase Driver |
Jenny Shaw | Cast | 2nd Virgin (uncredited) | |
 Mark Eden | Cast | Actor | Robert Manning |
 Michael Gough | Cast | Actor | Elder |
Michael Warren | Cast | Actor | Chauffeur (uncredited) |
Nicholas Head | Cast | Blacksmith (uncredited) | |
 Nita Lorraine | Cast | Actress | Woman with whip (uncredited) |
 Roger Avon | Cast | Actor | Sergeant Tyson (uncredited) |
 Ron Pember | Cast | Actor | Petrol Attendant (uncredited) |
Rosemarie Reede | Cast | Esther | |
 Rupert Davies | Cast | Actor | The Vicar (uncredited) |
Terry Raven | Cast | Actor | First Car-Chase Driver |
 Virginia Wetherell | Cast | Actress | Eve Morley |
Vivienne Carlton | Cast | Sacrifice Victim (uncredited) | |
Kevin Smith | Cast | Actor | Party Drunk |
Vicky Richards | Cast | Party Girl Belly-Dancing | |
Nova St. Clair | Cast | Girl Chased by Cars | |
Tasma Berenton | Cast | Party Girl Being Painted | |
| Person | Type | Job | Role(s) |
