criminal mastermind and hypnotist who ten years earlier went mad. Mabuse spends his days frantically writing detailed plans for crimes while a criminal gang is committing them according to "the plans of the Doctor", with whom they confer only from behind a curtain. When Baum's colleague Dr. Kramm (Theodor Loos) by chance discovers that recent crimes implement Mabuse's writings, Kramm is shot by the gang's execution squad, Hardy (Rudolf Schündler) and Bredow (Oskar Höcker). A clue scratched in a glass window pane at Hofmeister's crime scene causes Lohmann to suspect Mabuse. On arrival at the asylum, Baum reveals that Mabuse has died. When Lohmann disparagingly talks about "Mabuse the criminal", Baum emphatically speaks about "Mabuse the genius", whose brilliance would have destroyed a corrupt world. Baum continues to study Mabuse's writings and communes with the ghost of Dr. Mabuse. The spirit of Mabuse speaks about an "unlimited reign of crime" and merges with the Professor's silhouette. During the same night, a hidden figure confers with sections of his organisation, preparing various crimes such as an attack on a chemical plant, robbing a bank, counterfeiting, poisoning water and destroying harvests. One of the gang members, Thomas Kent (Gustav Diessl), is conflicted between his criminal work, which he needs to do for money, and his affection for a young woman named Lilli (Wera Liessem). Lilli, devoted to Kent, begs him to confide in her. Kent finally confesses his past and his current situation to her. The two decide to inform the police but are abducted and locked in the strange meeting room with the curtain. The hidden figure announces their death when they discover that the curtained alcove contains only a loudspeaker and that there is a time bomb. After several escape attempts have failed, they flood the place to lessen the impact of the explosion and break free when the time bomb goes off. Meanwhile, the police are besieging a flat where several gangsters, including Hardy and Bredow, are staying. After a shootout, Hardy commits suicide while the other gangsters surrender. As Bredow testifies that they assassinated Dr. Kramm in the vicinity of the asylum, Lohmann arranges a confrontation between the gangsters and the Professor, which proves inconclusive. On Kent and Lilli's arrival, Baum's shocked reaction to Kent makes Lohmann suspicious. Lohmann and Kent visit the asylum, where they discover that Baum is the mastermind and has planned an attack on