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John Mills as Supt. Mike Halloran |
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Charles Coburn as Dr. John Fenner |
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Barbara Bates as Elizabeth Fenner |
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Derek Farr as Mark Roper |
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Alec McCowen as Peter Crowley (as Alec Mc Cowen) |
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Fay Compton as Mrs. Crowley |
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Geoffrey Keen as Charles Dixon |
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Margaretta Scott as Helen Dixon |
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Meredith Edwards as Police Sgt. Rogers |
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Harry Locke as Police Sgt. Beale |
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Raymond Huntley as Dr. Reese |
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Harry Fowler as Leslie (Bandleader) |
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Maureen Connell as Mary Roper |
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Magda Miller as Molly Stevens |
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Newton Blick as Asst. Commissioner Beckett |
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Oscar Quitak as David |
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Totti Truman Taylor as Mrs. Gerrard |
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Grace Arnold as Club Committee Woman |
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Elizabeth Seal as 'Fiona' / Fiona Dixon |
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Dandy Nichols as Mrs Wilson (uncredited) |
| Directing | John Guillermin | Director |
| Writing | Robert Westerby | Writer |
| Writing | Ken Hughes | Writer |
| Production | Maxwell Setton | Producer |
| Sound | Tristram Cary | Original Music Composer |
| Camera | Basil Emmott | Director of Photography |
| Editing | Max Benedict | Editor |
| Art | John Elphick | Art Direction |
| Costume & Make-Up | Eric Carter | Makeup Artist |
| Costume & Make-Up | Bobbie Smith | Hairstylist |
