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Dirk Bogarde as Nicholas Whistler |
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Sylva Koscina as Vlasta Simoneva |
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Robert Morley as Col. Cunliffe |
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Leo McKern as Simoneva |
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Roger Delgado as Josef |
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Derek Fowlds as Sun Bathing Man |
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Eric Pohlmann as Golushha |
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John Le Mesurier as Roger Allsop |
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Noel Harrison as Johnnie |
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Amanda Grinling as Cunliffe’s Secretary |
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Philo Hauser as Vicek |
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John Junkin as Clerk in Opening Scene |
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Jill Melford as Lorna |
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Derek Nimmo as Fred |
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Richard Vernon as Roddinghead |
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Brook Williams as Leon |
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Gertan Klauber as Technician in Czech Glass Factory |
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Richard Pasco as Plakov |
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Alan Tilvern as Simenova's Assistant |
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Norman Bird as Employment Exchange Clerk |
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Andre Charisse as Waiter |
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Frank Finlay as British Embassy Porter |
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Sandra Hampton as Russian Dancer |
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Harriet Medin as Hotel Receptionist |
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William Mervyn as Passenger on Plane |
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Tiberio Mitri as The Milkman |
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George Pravda as Pravelko |
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Robert Rietti as |
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John Standing as Men's Room Attendant |
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Eddie Boyce as Man in Labour Exchange |
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Jim Brady as Worker in Canteen |
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Igo Meggido as Russian Dancer (uncredited) |
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Reg Thomason as Diner in Restaurant (uncredited) |
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Pietro Tordi as Old man at the swimming pool (uncredited) |
| Writing | Lionel Davidson | Novel |
| Sound | Angelo Francesco Lavagnino | Original Music Composer |
| Directing | Ralph Thomas | Director |
| Art | Syd Cain | Art Direction |
| Writing | Lukas Heller | Screenplay |
| Editing | Alfred Roome | Editor |
| Camera | Ernest Steward | Director of Photography |
| Production | Betty E. Box | Producer |
| Costume & Make-Up | Yvonne Caffin | Costume Design |
| Costume & Make-Up | W.T. Partleton | Makeup Artist |
| Costume & Make-Up | Stella Rivers | Hairdresser |
| Directing | Giorgio Gentili | Assistant Director |
| Directing | Simon Relph | Assistant Director |
| Sound | Don Sharpe | Sound Editor |
| Sound | John W. Mitchell | Sound Recordist |
| Sound | Bill Daniels | Sound Recordist |
| Camera | James Bawden | Camera Operator |
| Production | Earl St. John | Executive Producer |
