An insurance investigator tumbles onto a series of similar deaths, by brain hemorrhage, of patients of a psychiatric clinic in France where therapy involves a device which can implant visual imagery in the minds of patients, ostensibly to help them relax.
| Camera | Bert Mason | Director of Photography |
| Editing | Geoffrey Muller | Editor |
| Camera | Teddy Catford | Director of Photography |
| Directing | David Paltenghi | Director |
| Writing | Charles Eric Maine | Screenplay |
| Directing | Montgomery Tully | Director |
| Production | Alec C. Snowden | Producer |
| Camera | Bernard Lewis | Camera Operator |
| Production | Richard Gordon | Executive Producer |
