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Susan Strasberg as Penny Appleby |
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Ronald Lewis as Robert |
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Ann Todd as Jane Appleby |
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კრისტოფერ ლი as Doctor Pierre Gerrard |
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John Serret as Inspector Legrand |
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Leonard Sachs as Mr. Spratt |
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Anne Blake as Marie the Maid |
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Fred Johnson as Mr. Appleby |
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Madame Lobegue as Swiss Air Hostess (uncredited) |
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Bernard Browne as Gendarme (uncredited) |
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Frederick Rawlings as Plainclothes Sergeant (uncredited) |
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Richard Klee as Plainclothes Sergeant (uncredited) |
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Brian Jackson as Plainclothes Officer (uncredited) |
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Heinz Bernard as Plainclothes Officer (uncredited) |
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Frederick Schrecker as Plainclothes Officer (uncredited) |
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Gordon Sterne as Policeman (uncredited) |
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Rodney Burke as Policeman (uncredited) |
| Writing | Jimmy Sangster | Writer |
| Sound | Clifton Parker | Original Music Composer |
| Production | Jimmy Sangster | Producer |
| Editing | Eric Boyd-Perkins | Editor |
| Camera | Douglas Slocombe | Director of Photography |
| Directing | Seth Holt | Director |
| Art | Bernard Robinson | Production Design |
| Production | Michael Carreras | Executive Producer |
| Camera | Desmond Davis | Camera Operator |
| Directing | Terry Lens | Second Assistant Director |
| Camera | George Higgins | Still Photographer |
| Production | William Hill | Production Manager |
| Directing | Pamela Mann | Continuity |
| Sound | Len Shilton | Sound Recordist |
| Editing | James Needs | Supervising Editor |
| Sound | John Hollingsworth | Music Supervisor |
| Art | William Constable | Assistant Art Director |
| Crew | Les Bowie | Special Effects |
| Camera | Ray Andrew | Clapper Loader |
| Directing | David Tomblin | Assistant Director |
| Costume & Make-Up | Basil Newall | Makeup Artist |
| Sound | Jim Groom | Sound Editor |
| Camera | Len Harris | Additional Camera |
| Camera | Egil S. Woxholt | Underwater Camera |
| Production | Stuart Lyons | Casting |
| Camera | Harry Oakes | Additional Camera |
| Editing | John Crome | Assistant Editor |
| Art | Thomas Goswell | Art Direction |
| Sound | Teddy Mason | Sound Recordist |
| Sound | John Crome | Assistant Sound Editor |
| Costume & Make-Up | Eileen Bates | Hairstylist |
| Crew | Ian Scoones | Special Effects Assistant |
| Costume & Make-Up | Dora Lloyd | Wardrobe Master |
| Sound | Les Hammond | Sound Recordist |
| Camera | John M. Jordan | Underwater Camera |
