

A husband-and-wife detective team look into the murder of one of her friends, whose father--a prominent scientist--has been kidnapped. They find themselves up against a sinister crime organization headed by a mysterious figure known only as "Z".
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Cast

John Bentley
Paul Temple

Dinah Sheridan
Steve Temple

Jack Livesey
Sir Graham Forbes

Beatrice Varley
Mrs. Weston

Barbara Couper
Mrs. Morgan
Jenny Mathot
Jacqueline Giraud
Andrew Leigh
Professor Hardwick
Hugh Dempster
Oliver Ffollett

Dino Galvani
Van Draper

Ivan Samson
Major Murray

Bruce Seton
Bill Bryant
Leo de Pokorny
Dr. Steiner
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