Peter Cushing
Dr. Victor Stein
Distribution
Francis Matthews
Dr. Hans Kleve
Eunice Gayson
Margaret Conrad
Michael Gwynn
Karl
John Welsh
Bergman
Lionel Jeffries
Fritz
Oscar Quitak
Dwarf
Richard Wordsworth
Up Patient
John Stuart
Inspector
Michael Ripper
Kurt
Charles Lloyd Pack
President
Arnold Diamond
Molke
Marjorie Gresley
Countess Barscynska
Anna Walmsley
Vera Barscynska
George Woodbridge
Janitor
Ian Whittaker
Boy
Avril Leslie
Girl
John Tatham
Manservant (uncredited)
