Suspect

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
　　Brian Oulton... Director
　　Robert Bruce... Levers
　　John Payne... Iverson