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