Fritz Lang's final directorial project.
The car which Dr. Mabuse escapes in is described in the film as a large American sedan; actually, it's an inexpensive vintage (circa 1952) Chevrolet, a poor choice for Herr Doktor and an obvious sign that it's going to be wrecked.
This film re teamed director Fritz Lang with art director Erich Kettelhut. Kettelhut had worked for Lang on the first Dr. Mabuse film, "Dr. Mabuse: The Gambler" (1922)
To further disguise the fact that the character Peter Cornelius was being played by Wolfgang Preiss, and was therefore actually Mr. Mabuse, another actor was used to dub in his voice.