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.
Peter Barnes
Writer
Frank Launder
Writer
Robert Tronson
Director
Bernard Lee
Henry Houghton
William Sylvester
Gordon Lonsdale
Margaret Tyzack
Elizabeth Gee
David Kossoff
Peter Kroger
Nancy Nevinson
Helen Kroger
Thorley Walters
Cmdr. Winters
Gillian Lewis
Marjorie Shaw
Newton Blick
P.O. Meadows
Philip Latham
Captain Ray
The Quiller Memorandum58%
Time Without Pity65%
They Made Me a Fugitive66%
Nancy58%
Topaz60%
The Truth About Emanuel59%
Miss Marple: They Do It with Mirrors68%
Point Blank70%
The Locket63%
Plunder Road70%
Islands61%
The Young Savages65%
Pickup on South Street73%
The Mirror Crack'd60%
WarGames70%
Reality64%
House of Bamboo61%
Madigan61%
Knock on Any Door62%
Seeds of Yesterday64%
