A government team researching cures for plague find their results put on the Official Secrets list. One of their number is so incensed by this that he lets the maimed and jealous companion of a female colleague draw him into what, technically, could be a treasonable act.
Tony Britton
Dr. Robert Marriott
Virginia Maskell
Dr. Lucy Byrne
Ian Bannen
Alan Andrews
Kenneth Griffith
Dr Shole
Peter Cushing
Professor Sewell
Thorley Walters
Special Agent Prince
Donald Pleasence
Parsons, alias Bill Brown
Spike Milligan
Arthur, lab orderly
Raymond Huntley
Sir George Gatting the Minister of Defense
Sam Kydd
Slater
Anthony Booth
Parkin
Basil Dignam
Dr Childs
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