 | Dennis Lotis als Richard Barlow |
 | Christopher Lee als Prof. Alan Driscoll |
 | Patricia Jessel als Elizabeth Selwyn / Mrs. Newless |
 | Tom Naylor als Bill Maitland |
 | Betta St. John als Patricia Russell |
 | Venetia Stevenson als Nan Barlow |
 | Valentine Dyall als Jethrow Keane |
 | Ann Beach als Lottie |
 | Norman MacOwan als Rev. Russell |
 | James Dyrenforth als Garage Attendant |
 | Fred Johnson als The Elder |
| William Abney als Policeman |
| John Llewellyn Moxey | Director |
| George Baxt | Screenplay |
| Milton Subotsky | Story |
| John Pomeroy | Editor |
| John Blezard | Art Direction |
| Douglas Gamley | Music |
| Desmond Dickinson | Director of Photography |
| Jack Atcheler | Camera Operator |
| Cliff Richardson | Special Effects |
| Barbara Barnard | Hairstylist |
| George Claff | Makeup Artist |
| Milton Subotsky | Executive Producer |
| Max Rosenberg | Producer |
| Seymour S. Dorner | Executive Producer |
| Donald Taylor | Producer |
| Richard Bird | Sound Mixer |
| Freda Gibson | Wardrobe Supervisor |
