Directed by
| Damiano Damiani | ||
Writing Credits
| Nicola Badalucco | ... | (story by) and |
| Damiano Damiani | ... | (story by) |
| Nicola Badalucco | ... | (screenplay by) and |
| Damiano Damiani | ... | (screenplay by) |
| Francis Clifford | ... | (based on the novel "The Grosvenor Square Goodbye") |
Cast (in credits order) complete, awaiting verification
| Tony Musante | ... | John Dannahay | |
| Claudia Cardinale | ... | Mrs. De Mauro | |
| John Steiner | ... | Douglas Grayson | |
| Renzo Palmer | ... | Parenti | |
| Fabrizio Jovine | ... | Inspector Moreno | |
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Wolfango Soldati | ... | Harry Lambert |
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Gianrico Tondinelli | ... | Jack |
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Angela Goodwin | ... | The Ambassador's Wife |
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Anna Zinnemann | ... | Renata |
| John Forsythe | ... | The American Ambassador | |
| Francesco Carnelutti | ... | Agostino | |
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Mauro Barabani | ||
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Massimiliano Baratta | ||
| Luciano Catenacci | ... | Vincent | |
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Antonio Maimone | ... | CIA Agent |
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Gino Narciso | ||
| Sergio Doria | |||
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Chris Esposito | ... | (as Christian Esposito) |
| Rest of cast listed alphabetically: | |||
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Nat Bush | ... | CIA Agent (uncredited) |
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Ruggero De Daninos | ... | De Mauro (uncredited) |
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Giovanni Di Benedetto | ... | Foreign Secretary (uncredited) |
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John P. Dulaney | ... | (uncredited) |
| Alessandro Haber | ... | Blondie (uncredited) | |
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Piero Palermini | ... | Berto (uncredited) |
| Gioia Scola | ... | Maria Soli (uncredited) | |
Produced by
| Mario Cecchi Gori | ... | producer |
Music by
| Guido De Angelis | ||
| Maurizio De Angelis | ||
Cinematography by
| Luigi Kuveiller | ||
Editing by
| Antonio Siciliano | ||
Set Decoration by
| Egidio Spugnini | ||
Makeup Department
| Giuseppina Bovino | ... | hair stylist |
| Franco Corridoni | ... | makeup artist |
| Gino Zamprioli | ... | makeup artist (uncredited) |
Production Management
| Romano Di Casimiro | ... | production supervisor |
| Vincenzo Mazzucchi | ... | production manager |
Sound Department
| Benito Alchimede | ... | boom operator |
| Luigi Salvi | ... | sound recordist |
Special Effects by
| Paolo Ricci | ... | special effects |
Camera and Electrical Department
| Antonio Annunziata | ... | assistant camera |
| Sergio Coletta | ... | chief electrician |
| Umberto Dessena | ... | grip |
| Sergio Emidi | ... | key grip |
| Renato Palmieri | ... | assistant camera |
| Ubaldo Terzano | ... | camera operator |
| Italo Tonni | ... | still photographer |
Costume and Wardrobe Department
| Orsola Liberati | ... | costumer |
Editorial Department
| Ugo Morelli | ... | assistant editor |
| Sergio Muzzi | ... | assistant editor |
Script and Continuity Department
| Vittoria Vigorelli | ... | script supervisor |
Additional Crew
| Stefano Cialoni | ... | cashier |
| H.A.L. Craig | ... | dialogue adaptation: english language version (as Harry Craig) |
| Mario Lupi | ... | production accountant |
| Tommaso Pantano | ... | production assistant |
| Marcello Tassi | ... | production assistant |
| Ferruccio Amendola | ... | voice dubbing: Fabrizio Jovine (uncredited) |
| Manlio De Angelis | ... | voice dubbing: Wolfango Soldati (uncredited) |
| Michele Gammino | ... | voice dubbing: John Steiner (uncredited) |
| Sergio Graziani | ... | voice dubbing: Tony Musante (uncredited) |
