Dr. Victor Stein
Peter Cushing
Dr. Hans Kleve
Francis Matthews
President
Charles Lloyd Pack
Molke
Arnold Diamond
Countess Barscynska
Marjorie Gresley
Vera Barscynska
Anna Walmsley
Janitor
George Woodbridge
Boy
Ian Whittaker
Girl
Avril Leslie
Manservant (uncredited)
John Tatham
Kleine (uncredited)
Eugene Leahy
Policeman (uncredited)
Charles Gilliard
Margaret Conrad
Eunice Gayson
Patient (uncredited)
Jimmy Charters
Inga (uncredited)
Julia Nelson
Joseph the Groom (uncredited)
Robert Brooks Turner
Karl
Michael Gwynn
Bergman
John Welsh
Fritz
Lionel Jeffries
Dwarf
Oscar Quitak
Up Patient
Richard Wordsworth
Inspector
John Stuart
Kurt
Michael Ripper
Characters
Mary Shelley
Writer
Jimmy Sangster
Director
Terence Fisher
Producer
Anthony Hinds
Director of Photography
Jack Asher
Editor
Alfred Cox
Casting
Dorothy Holloway
Makeup Artist
Philip Leakey
Hairstylist
Henry Montsash
Additional Dialogue
George Baxt
Hurford Janes
Executive Producer
Michael Carreras
Original Music Composer
Leonard Salzedo
Production Design
Bernard Robinson
Sound Recordist
Jock May
Sound Editor
Costume Design
Rosemary Burrows