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Jeremy Spenser as Guido Ferugia |
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Guy Rolfe as John Morell |
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Kathleen Ryan as Catherine Morell |
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Kathleen Byron as Anne Bondini |
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Henry Oscar as Mario Bondini |
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Rosalie Crutchley as Carlotta Ferugia |
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Ferdy Mayne as Carlo Ferugia |
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James Robertson Justice as Sir Arthur Harold |
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John Slater as Dr. Lorenzo |
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Christopher Lee as Newsman |
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Hugo Schuster as Dr. Freihaus |
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Robert Rietti as Giuseppe |
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Robin Dowell as Nick Morell |
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Michael Balfour as Lucio |
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David McCallum Sr. as Leader of orchestra, Royal Albert Hall |
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Dora Hyde as Leader of orchestra, Naples |
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Michael Croudson as Nick's Friend |
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Don Liddel as Benjamino |
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Ben Willian as Car Driver |
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Alex Fields as Doorkeeper |
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Penny Dane as Maid |
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Leonard Trolley as Waiter |
| Sound | David McCallum Sr. | Orchestrator |
| Writing | Robert Westerby | Screenplay |
| Camera | George Stretton | Director of Photography |
| Costume & Make-Up | Biddy Chrystal | Hairdresser |
| Camera | Bill Allan | Camera Operator |
| Editing | Sidney Hayers | Editor |
| Directing | Dicky Leeman | Assistant Director |
| Sound | Reg Barnes Heath | Sound |
| Sound | Gordon K. McCallum | Sound |
| Art | Frederick Pusey | Art Direction |
| Sound | Muir Mathieson | Music Director |
| Camera | Ray Sturgess | Camera Operator |
| Sound | Winston Ryder | Sound Editor |
| Production | Denis Holt | Production Manager |
| Costume & Make-Up | George Blackler | Makeup Artist |
| Art | David Morrison | Assistant Art Director |
| Crew | Francis Carver | Special Effects |
| Directing | Yvonne Axeworthy | Continuity |
| Production | Donald B. Wilson | Producer |
| Crew | Bridget Boland | Additional Dialogue |
| Art | Vernon Dickson | Set Dresser |
| Directing | Fergus McDonell | Director |
| Writing | Aldous Huxley | Short Story |
