Garra Escarlate
Voltar
Basil RathboneSherlock Holmes
Nigel BruceDoctor Watson
Gerald HamerPotts / Tanner / Ramson
Paul CavanaghLord Penrose
Arthur HohlEmile Journet
Miles ManderJudge Brisson
Kay HardingMarie Journet
David ClydePolice Sergeant Thompson
Ian WolfeDrake
Victoria HorneNora
Al FergusonAttendant (sem créditos)
Olaf HyttenHotel Day Desk Clerk (sem créditos)- Bobby HaleVillager in Pub (sem créditos)
- Harry Allen
Gertrude Astor
Clyde Fillmore- Charles Francis
- George Kirby
Pietro Sosso