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"Knowledge can be a deadly thing."
While vacationing in St. Moritz, a British couple receive a clue to an imminent assassination attempt, only to learn that their daughter has been kidnapped to keep them quiet.
33 Cast Members
Leslie Banks
Bob Lawrence
Edna Best
Jill Lawrence
Peter Lorre
Abbott
Frank Vosper
Ramon Levine
Hugh Wakefield
Clive
Nova Pilbeam
Betty Lawrence
Pierre Fresnay
Louis Bernard
Cicely Oates
Nurse Agnes
D.A. Clarke-Smith
Binstead
George Curzon
Gibson
Frank Atkinson
Policeman Shot Behind Mattress (uncredited)
Betty Baskcomb
Lawrence's Maid (uncredited)
Cot D'Ordan
Concierge (uncredited)
Tony De Lungo
Hotel Manager (uncredited)
Clare Greet
Mrs. Brockett (uncredited)
Pat Hagan
Policeman at Siege (uncredited)
Joan Harrison
Secretary (uncredited)
Edward A. Hill-Mitchelson
Minor Role (uncredited)
Alfred Hitchcock
Man in Raincoat Passing Bus (uncredited)
James Knight
Police Inspector (uncredited)
