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Jeanne Moreau as Eva Olivier |
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Stanley Baker as Tyvian Jones |
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Giorgio Albertazzi as Sergio Branco Malloni - a Movie Director (uncredited) |
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James Villiers as Alan McCormick - a Screenwriter |
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Virna Lisi as Francesca Ferrara |
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Riccardo Garrone as Michele - a Player |
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Lisa Gastoni as The Red-Headed Russian |
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Checco Rissone as Pieri |
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Enzo Fiermonte as Enzo |
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Nona Medici as Anna Maria |
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Roberto Paoletti as |
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Alexis Revidis as The Greek (as Alex Revidis) |
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Evi Rigano as (as Evy Rigano) |
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John R. Pepper as The Little Boy |
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Van Eicken as |
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Peggy Guggenheim as Baccarat-Player at Casino |
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Gilda Dahlberg as |
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Nicky Amey as |
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Vittorio De Sica as (uncredited) |
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Ignazio Dolce as (uncredited) |
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Joseph Losey as Patron at Harry's Bar (uncredited) |
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Enrico Maria Salerno as (uncredited) |
| Directing | Joseph Losey | Director |
| Writing | Hugo Butler | Writer |
| Writing | Evan Jones | Writer |
| Sound | Michel Legrand | Original Music Composer |
| Camera | Gianni Di Venanzo | Director of Photography |
| Editing | Reginald Beck | Editor |
| Editing | Franca Silvi | Editor |
| Production | Robert Hakim | Producer |
| Production | Raymond Hakim | Producer |
| Writing | James Hadley Chase | Novel |
| Production | Giorgio Baldi | Producer |
| Camera | Henri Decaë | Director of Photography |
| Art | Richard Macdonald | Production Design |
| Art | Luigi Scaccianoce | Production Design |
| Costume & Make-Up | Franco Freda | Makeup Artist |
| Production | Danilo Marciani | Production Manager |
| Directing | Tony Brandt | Assistant Director |
| Directing | Guidarino Guidi | Assistant Director |
| Directing | Paolo Ricci | Second Assistant Director |
| Art | Tullio D'Achille | Props |
| Art | Sergio Donà | Assistant Art Director |
| Sound | Paul Boistelle | Sound |
| Sound | Renato Cadueri | Sound |
| Sound | Claudio Maielli | Sound |
| Sound | Federico Savina | Sound |
| Sound | Amelio Verona | Sound |
| Camera | Pasqualino De Santis | Camera Operator |
| Camera | Emilio Loffredo | Assistant Camera |
| Camera | Marcello Mastrogirolamo | Assistant Camera |
| Lighting | Orlando Pellegrini | Gaffer |
| Camera | Anita Strizzi | Still Photographer |
| Sound | Carlo Savina | Music Director |
| Directing | Anita Borgiotti | Script Supervisor |
| Directing | Mimmola Girosi | Continuity |
| Crew | Raymond Hakim | Presenter |
| Crew | Robert Hakim | Presenter |
| Production | Dino Di Salvo | Production Secretary |
