Reparto (16)
Conrad NagelRichard Crosby
Leila HyamsHelen 'Nellie' O'Neill
Margaret WycherlyMadame Rosalie La Grange
Helene MillardMary Eastwood
Holmes HerbertSir Roscoe Crosby
Mary ForbesLady Alice Crosby
Bela LugosiInspector DelzanteCharles QuatermaineDr. Philip MasonMoon CarrollHelen Trent
Cyril ChadwickBrandon Trent
John DavidsonEdward 'Ned' WalesBertram JohnsHoward StandishGretchen HollandGrace Standish
Frank LeighProfessor Feringeea
Clarence GeldartCommissioner Grimshaw
Lal Chand MehraChotee