Casts
Peter Cushing
as Dr. Victor Stein
Francis Matthews
as Dr. Hans Kleve
Eunice Gayson
as Margaret Conrad
Michael Gwynn
as Karl
John Welsh
as Bergman
Lionel Jeffries
as Fritz
Oscar Quitak
as Dwarf
Richard Wordsworth
as Up Patient
John Stuart
as Inspector
Michael Ripper
as Kurt
