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Ralph Bates as Dr. Jekyll |
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Martine Beswick as Sister Hyde |
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Gerald Sim as Professor Robertson |
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Lewis Fiander as Howard |
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Susan Brodrick as Susan |
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Dorothy Alison as Mrs. Spencer |
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Ivor Dean as Burke |
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Philip Madoc as Byker |
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Irene Bradshaw as Yvonne |
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Neil Wilson as Older Policeman |
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Paul Whitsun-Jones as Sergeant Danvers |
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Tony Calvin as Hare |
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Dan Meaden as Town Crier |
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Virginia Wetherell as Betsy |
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Geoffrey Kenion as 1st Policeman |
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Bobby Parr as Young Apprentice |
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John Lyons as Sailor |
| Directing | Roy Ward Baker | Director |
| Sound | Bill Rowe | Sound |
| Costume & Make-Up | John Wilcox | Makeup Artist |
| Costume & Make-Up | Rosemary Burrows | Wardrobe Supervisor |
| Camera | Norman Warwick | Director of Photography |
| Production | James Liggat | Casting |
| Sound | David Whitaker | Original Music Composer |
| Editing | James Needs | Editor |
| Costume & Make-Up | Bernadette Ibbetson | Hairstylist |
| Writing | Brian Clemens | Screenplay |
| Writing | რობერტ ლუის სტივენსონი | Novel |
| Production | Roy Skeggs | Production Supervisor |
| Costume & Make-Up | Trevor Crole-Rees | Makeup Artist |
| Production | Albert Fennell | Producer |
| Production | Brian Clemens | Producer |
| Production | Don Weeks | Production Manager |
| Costume & Make-Up | Rosemary Burrows | Costume Design |
| Art | Robert Jones | Production Design |
| Sound | Philip Martell | Music Supervisor |
| Camera | Godfrey A. Godar | Camera Operator |
| Sound | Charles Crafford | Sound Editor |
| Crew | Michael Collins | Special Effects |
