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.

• 
  Roy Boulting
• 
  John Boulting
• 
  Basil Rayburn

• 
  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
• 
  Bruce Wightman
  Phil the Barman
• 
  Geoffrey Bayldon
  Rosson
• 
  Andre Charisse
  Heller
• 
  Ian Wilson
  Pin Table Man
• 
  Margaret Lacey
  Prince's Secretary