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The film is based on the actual events of the Portland Spy Ring trial in the U.K. A disgruntled Navy Clerk is transferred to a secret research establishment and is subsequently black-mailed/paid by Czech intelligence to procure secrets for them. He seduces the secretary who controls the most secret documents, and they enjoy the fruits of their treachery until the British authorities begin to close in on them.
March 23, 1964
British Lion Films
25 people
Bernard Lee
Henry Houghton
Acting
William Sylvester
Gordon Lonsdale
Acting
Margaret Tyzack
Elizabeth Gee
Acting
David Kossoff
Peter Kroger
Acting
Nancy Nevinson
Helen Kroger
Acting
Thorley Walters
Cmdr. Winters
Acting
Gillian Lewis
Marjorie Shaw
Acting
Newton Blick
P.O. Meadows
Acting
Philip Latham
Captain Ray
Acting
Cyril Chamberlain
Anderson
Acting
Justine Lord
Christina
Acting
Patrick Barr
Captain Warner
Acting
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