After a detective is assaulted by thugs and placed in an asylum run by Professor Baum, he observes the professor's preoccupation with another patient, the criminal genius Dr. Mabuse the hypnotist. When Mabuse's notes are found to be connected with a rash of recent crimes, Commissioner Lohmann must determine how Mabuse is communicating with the criminals, despite conflicting reports on the doctor's whereabouts, and capture him for good.
Rudolf Klein-Rogge
as Dr. Mabuse
Oscar Beregi Sr.
as Prof. Dr. Baum
Camilla Spira
as Juwelen-Anna
Otto Wernicke
as Kommissar Lohmann
Paul Henckels
as Lithograph
Theo Lingen
as Karetzky
Rudolf Schündler
as Hardy
Theodor Loos
as Dr. Kramm
Karl Meixner
as Hofmeister
Gustav Diessl
as Kent
Gerhard Bienert
as
Josef Dahmen
as
