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James Mason as Cmdr. Max Easton |
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George Sanders as Sir Charles Holland |
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Vera Miles as Virginia Killain |
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Robert Flemyng as Cmdr. John Larkin |
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Oliver Johnston as Minister |
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William Kendall as Tom |
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Duncan Lamont as 1st Special Branch man Gregson |
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Harry Andrews as Capt. Graham |
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Peter Barkworth as Sub Lt. Brown |
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Rachel Gurney as Clara Holland |
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Martin Stephens as John Holland |
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Waveney Lee as Marcia Holland |
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Charles Carson as Robert Holland |
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Junia Crawford as Susan |
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Henry B. Longhurst as Club Member (as Henry Longhurst) |
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Roger Maxwell as Club Member |
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Gerald Case as Club Member |
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Donald Bisset as Club Member |
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Desmond Roberts as Club Member |
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Reginald Smith as Club Steward |
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Rosemary Dorken as WREN Officer |
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MacDonald Parke as Jason Parrish (as Macdonald Parke) |
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Mavis Villiers as Adele Parrish |
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Ernest Clark as Cmdr. Bates |
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Alexander Archdale as Local Doctor (uncredited) |
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Basil Dignam as Lt. Cmdr. Evans at P.R.O. (uncredited) |
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Mabel Etherington as Nightclub Patron (uncredited) |
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Gordon Harris as 2nd Special Branch Man Jones (uncredited) |
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Barbara Hicks as Miss Price (uncredited) |
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John Horsley as 1st Editor (uncredited) |
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Frederick Kelsey as Club Member (uncredited) |
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John Le Mesurier as Head of the Admiralty (uncredited) |
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Ronald Leigh-Hunt as 2nd Editor (uncredited) |
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Richard Marner as Russian Officer Cornered by Max Easton (uncredited) |
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William Mervyn as Capt. Balfour (uncredited) |
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Andre Mikhelson as 2nd Russian Officer (uncredited) |
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John More as American General at Embassy Party (uncredited) |
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Dickie Owen as 2nd Policeman (uncredited) |
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Frederick Piper as Hall Porter (uncredited) |
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Pat Ryan as Nightclub Patron (uncredited) |
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Stanley Zevic as 1st Russian Officer (uncredited) |
| Directing | Guy Hamilton | Director |
| Writing | Paul Winterton | Novel |
| Writing | Roger MacDougall | Screenplay |
| Writing | Ivan Foxwell | Writer |
| Writing | Guy Hamilton | Writer |
| Production | Ivan Foxwell | Producer |
| Sound | Philip Green | Original Music Composer |
| Camera | John Wilcox | Director of Photography |
| Editing | Alan Osbiston | Editor |
| Production | Irene Howard | Casting |
| Art | Reg Bream | Draughtsman |
| Art | Elliot Scott | Art Direction |
| Directing | Charles Blair | Second Assistant Director |
| Production | Noreen Hipwell | Production Secretary |
