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.
Unfortunately the movie The Testament of Dr. Mabuse is not yet available on HBO Max.
| Writing | Thea von Harbou | Screenplay |
| Editing | Conrad von Molo | Editor |
| Writing | Norbert Jacques | Novel |
| Writing | Fritz Lang | Screenplay |
| Directing | Fritz Lang | Director |
| Production | Fritz Lang | Producer |
| Camera | Fritz Arno Wagner | Director of Photography |
| Production | Seymour Nebenzal | Producer |
| Sound | Hans Erdmann | Original Music Composer |
| Editing | Lothar Wolff | Editor |
| Art | Emil Hasler | Art Direction |
| Art | Karl Vollbrecht | Art Direction |
| Camera | Károly Vass | Director of Photography |
| Sound | Walter Sieber | Original Music Composer |
| Costume & Make-Up | Hans Kothe | Costume Design |
| Costume & Make-Up | Franz Siebert | Makeup Artist |
| Sound | Conrad von Molo | Sound Editor |
| Sound | Adolf Jansen | Sound Designer |
