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Anton Diffring as Dr. Schuler |
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Erika Remberg as Elissa Caro |
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Yvonne Monlaur as Nicole Vanet |
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Donald Pleasence as Vanet |
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Jane Hylton as Angela |
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Kenneth Griffith as Martin |
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Conrad Phillips as Inspector Arthur Ames |
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Jack Gwillim as Supt. Andrews |
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Vanda Hudson as Magda von Meck |
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Yvonne Romain as Melina |
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Colette Wilde as Evelyn Morley |
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William Mervyn as Dr. Morley |
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Peter Swanwick as Inspector Knopf |
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Carla Challoner as Nicole (as a Child) |
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Kenny Baker as Dwarf |
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Walter Gotell as Baron Von Gruber |
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Kenneth J. Warren as First Roustabout |
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Jack Carson as Chief Eagle Eye |
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Glyn Houston as Carnival Barker (uncredited) |
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Reg Thomason as Roustabout (uncredited) |
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Arthur Dibbs as Circus Audience Member (uncredited) |
| Writing | George Baxt | Screenplay |
| Production | Samuel Z. Arkoff | Producer |
| Production | Julian Wintle | Producer |
| Editing | Reginald Mills | Editor |
| Directing | Sidney Hayers | Director |
| Production | Leslie Parkyn | Producer |
| Camera | Douglas Slocombe | Director of Photography |
| Editing | Sidney Hayers | Editor |
| Sound | Muir Mathieson | Original Music Composer |
| Sound | Franz Reizenstein | Original Music Composer |
| Production | Norman Priggen | Associate Producer |
| Costume & Make-Up | Maude Onslow | Hairstylist |
| Sound | Lionel Selwyn | Sound Editor |
| Sound | Ken Cameron | Sound Recordist |
| Costume & Make-Up | Vi Murray | Wardrobe Master |
| Art | Jack Shampan | Art Direction |
| Costume & Make-Up | Trevor Crole-Rees | Makeup Artist |
| Sound | Len Page | Sound Recordist |
| Costume & Make-Up | Morris Angel | Costume Design |
| Editing | Harry Ledger | Assistant Editor |
| Production | Charles Permane | Production Manager |
