 | Kenny Everett als Dr. Lukas Mandeville |
 | Pamela Stephenson als Dr. Barbara Coyle |
 | Vincent Price als Sinister Man |
 | Gareth Hunt als Elliot Broome |
 | Don Warrington als Stephen Wilson |
 | John Fortune als John Harrison |
 | Sheila Steafel als Sheila Finch |
 | John Stephen Hill als Henry Noland |
 | Cleo Rocos als Deborah Kedding |
 | Graham Stark als Blind Man |
 | Pat Ashton als Barmaid |
 | David Lodge als Inspector Goule |
 | Davilia O'Connor als Sheila’s Mum |
 | Debbie Linden als Attractive Girl |
| Tim Barrett als Doctor |
 | Oscar Quitak als Doctor |
| Ellis Dale als Patient |
 | Barry Cryer als Police Inspector |
| Anna Dawson als Nurse |
 | Gordon Rollings als Man at Bar |
| Jack Le White als Old Man |
| Ray Cameron als Policeman |
| Ray Cameron | Director |
| Brian West | Director of Photography |
| Laurence Myers | Executive Producer |
| Brian Tagg | Editor |
| Sue Whatmough | Casting |
| Stuart D. Donaldson | Executive Producer |
| Mike Moran | Original Music Composer |
| John Downes | Co-Producer |
| Ray Cameron | Producer |
| Mark London | Original Music Composer |
| Ray Cameron | Writer |
| Dusty Miller | Director of Photography |
| Barry Cryer | Writer |
| John Sunderland | Art Direction |
| Ken Baker | Assistant Director |
| Peter Bennett | Second Assistant Director |
| Paul Taylor | Third Assistant Director |
| John Maskall | Camera Operator |
| John Ignatius | Focus Puller |
| Peter Turner | Clapper Loader |
| Nick Pearson | Grip |
| Chris Munro | Sound Recordist |
| John Stevenson | Boom Operator |
| Cheryl Lea | Continuity |
| Monica Rogers | Production Coordinator |
| Judy Summers | First Assistant Editor |
| David M. Bosley | Assistant Editor |
| Marcus Thompson | Sound Editor |
| Andy Nelson | Sound Editor |
| George Boner | Gaffer |
| John Rogers | Best Boy Electric |
| Ron Holmwood | Electrician |
| Eric Allwright | Makeup Artist |
| Elaine Bowerbank | Hairdresser |
| Paul Vachon | Wardrobe Master |
| Jill Dodds | Wardrobe Assistant |
| Heather Armitage | Assistant Art Director |
| Dennis Fruin | Property Master |
| Ray Tranter | Production Accountant |
| Jo Hallam | Assistant Accountant |
| David Farrell | Still Photographer |
| Lynda Levy | Publicist |
| Bob Cross | Construction Manager |
