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Pat Boone as John J. 'Jack' Robinson |
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Erica Rogers as Cynthia Marley |
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Dennis Price as Cornwallis Marley |
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Andrée Melly as Natalia Marley |
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Valentine Dyall as Reginald Marley |
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Jack Bligh as Percival Marley |
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Archie Duncan as Muldoon Marley |
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Erik Chitty as Grandpa Marley |
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Oswald Laurence as Doctor |
| Directing | Terence Fisher | Director |
| Writing | Ray Russell | Screenplay |
| Sound | Douglas Gamley | Original Music Composer |
| Production | Margia Dean | Producer |
| Production | Robert L. Lippert | Executive Producer |
| Editing | Robert Winter | Editor |
| Art | Harry White | Art Direction |
| Costume & Make-Up | Bill Lodge | Makeup Artist |
| Costume & Make-Up | Daphne Vollmer | Hairstylist |
| Production | Clifford Parkes | Production Manager |
| Directing | Frank Nesbitt | Assistant Director |
| Sound | George Stephenson | Sound Recordist |
| Camera | Len Harris | Camera Operator |
| Costume & Make-Up | Jean Fairlie | Wardrobe Supervisor |
| Sound | Philip Martell | Conductor |
| Directing | Renée Glynne | Continuity |
| Production | Maureen Newman | Production Accountant |
| Production | Barbara Allen | Production Secretary |
| Camera | Arthur Lavis | Director of Photography |
| Editing | Clive Smith | Assistant Editor |
