Casting
Boris Karloff
Dr. Victor Sartorius
Joan Wyndham
Eve Rowe
Arthur Margetson
Roger Clifford
Mona Goya
Yvonne Clifford
Anthony Ireland
Capt. Arthur Halliday
Morton Selten
Sir Charles Clifford
Nina Boucicault
Mary Clifford
Gibb McLaughlin
Jacques
J.H. Roberts
Chalmers
Victor Rietti
Doctor Bousquet
Wilfrid Caithness
Morrocan Official