Boris Karloff
Prof. Morlant
Acting
Cedric Hardwicke
Broughton
Acting
Ernest Thesiger
Laing
Acting
Ralph Richardson
Nigel Hartley
Acting
Dorothy Hyson
Betty Harlon
Acting
Anthony Bushell
Ralph Morlant
Acting
Kathleen Harrison
Kaney
Acting
Harold Huth
Aga Ben Dragore
Acting
D.A. Clarke-Smith
Mahmoud
Acting
Jack Raine
Davis the Chauffeur (uncredited)
Acting
George Relph
Doctor (uncredited)
Acting