Casts
Margaret Lockwood
as Helene Ardouin
Hugh Sinclair
as Inspector Calas
James Mason
as Andre Laurent
Raymond Lovell
as Prof. Winkler
Rodney Ackland
as Winker's Assistant
Enid Stamp-Taylor
as Dany
Hartley Power
as Gordon
Jane Carr
as Delia
Edana Romney
as Winkler's Assistant
