Scotland Yard is after a homicidal maniac called The Blue Hand, which is what he uses to kill his victims.
Harald Leipnitz
as Inspektor Craig
Klaus Kinski
as Dave Emerson / Richard Emerson
Carl Lange
as Dr. Albert Mangrove
Ilse Steppat
as Lady Emerson
Hermann Lenschau
as Rechtsanwalt Douglas
Diana Körner
as Myrna Emerson
Gudrun Genest
as Schwester Harris
Albert Bessler
as Butler Anthony
Richard Haller
as Edward Appleton / Die Blaue Hand
Ilse Pagé
as Miss Mabel Finley
Fred Haltiner
as Wärter Reynolds
Peter Parten
as Robert Emerson
