A mysterious artifact unearthed below a London subway station proves to have powerful psychic effects on the people around.
| Crew | Les Bowie | Special Effects |
| Production | Anthony Nelson Keys | Producer |
| Sound | Tristram Cary | Original Music Composer |
| Camera | Arthur Grant | Director of Photography |
| Directing | Roy Ward Baker | Director |
| Writing | Nigel Kneale | Screenplay |
| Writing | Nigel Kneale | Original Story |
| Art | Bernard Robinson | Supervising Art Director |
| Sound | Philip Martell | Music Supervisor |
| Costume & Make-Up | Pearl Tipaldi | Hairstylist |
| Production | Irene Lamb | Casting |
| Camera | Moray Grant | Camera Operator |
| Sound | Roy Hyde | Sound Editor |
| Art | Kenneth Ryan | Art Direction |
| Production | Ian Lewis | Production Manager |
| Editing | James Needs | Supervising Film Editor |
| Costume & Make-Up | Michael Morris | Makeup Artist |
| Costume & Make-Up | Rosemary Burrows | Wardrobe Supervisor |
| Directing | Bert Batt | Assistant Director |
| Editing | Spencer Reeve | Editor |
| Directing | Doreen Dearnaley | Continuity |
| Sound | Sash Fisher | Sound Recordist |
