Suspect
Cast
Virginia Maskell
Dr. Lucy Byrne
Thorley Walters
Special Agent Prince
Donald Pleasence
Parsons, alias Bill Brown
Raymond Huntley
Sir George Gatting the Minister of Defense
Anthony Booth
Parkin
Brian Oulton
Director
John Payne
Iverson
Basil Dignam
Dr Childs
Ian Wilson
Pin Table Man
Murray Melvin
Teddy Boy
Ian Bannen
Alan Andrews
Peter Cushing
Professor Sewell
Spike Milligan
Arthur, lab orderly
Geoffrey Bayldon
Rosson
Margaret Lacey
Prince's Secretary
Tony Britton
Dr. Robert Marriott
Kenneth Griffith
Dr Shole
Sam Kydd
Slater
Andre Charisse
Heller