The Door with Seven Locks

Dr. Manetta

June Lansdowne

Ann Cody

Glenda Baker

Edward Havelock

Dick Martin

Inspector Cornelius 'Andy' Sneed

Luis Silva

Lord Charles Francis Selford

Bevan Cody

Tom Cawler

Chief Commissioner

John Selford

P.C. in Sneed's Office (Uncredited)

Handwriting Expert (Uncredited)

Chief Commissioner (Uncredited)