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Sergio Rossi as Thomas Royle |
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Giuseppe Pambieri as Neville Strange |
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Laura Trotter as Kay |
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Margherita Guzzinati as Audrey |
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Angela Goodwin as Mary Aldin |
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Andrea Bosic as Avvocato Treves |
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Alida Valli as Lady Camilla Tressilian |
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Fabrizio Moroni as Ted Latimer |
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Renato Montalbano as Sovraintendente Battle |
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Renzo Ozzano as L'agente Benson |
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Maurizio Romoli as L'ispettore Reach |
| Camera | Ludovico Negri Della Torre | Director of Photography |
| Writing | Agatha Christie | Novel |
| Directing | Stefano Roncoroni | Director |
| Crew | Connie Ricono | Translator |
| Writing | Stefano Roncoroni | Adaptation |
| Art | Davide Negro | Set Designer |
| Costume & Make-Up | Dario Cecchi | Costumer |
| Lighting | Ludovico Negri Della Torre | Lighting Technician |
