After a series of scientific experiments directed towards freeing the inner man and controlling human personalities, the kindly, generous Dr Henry Jekyll succeeds in freeing his own alter ego, Edward Hyde, a sadistic, evil creature whose pleasure is murder.
| Sound | Monty Norman | Original Music Composer |
| Editing | Eric Boyd-Perkins | Editor |
| Costume & Make-Up | Roy Ashton | Makeup Artist |
| Writing | Robert Louis Stevenson | Novel |
| Art | Don Mingaye | Art Direction |
| Art | Bernard Robinson | Production Design |
| Directing | Terence Fisher | Director |
| Writing | Wolf Mankowitz | Screenplay |
| Sound | David Heneker | Original Music Composer |
| Production | Michael Carreras | Producer |
| Camera | Jack Asher | Director of Photography |
| Costume & Make-Up | Mayo | Costume Design |
| Production | Anthony Nelson Keys | Associate Producer |
| Costume & Make-Up | Ivy Emmerton | Hairdresser |
| Production | Clifford Parkes | Production Manager |
