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