Considering how much Adolf Hitler relied upon his scientists during WWII, the anti-technology stance of Der Herr Der Welt (Ruler of the World) is amazing. After a long absence, Dr. Heller (Walter Janssen) returns to his laboratory, where he learns that his demented chief assistant (Arlbert Waeschler) has developed a robot. Dr. Heller approves of this, but he's less happy with the fact that the robot is equipped with a death ray. His objections don't carry too much weight, however, inasmuch as Heller is quickly dispatched by the homicidal robot. The story briefly goes off on another tangent as Heller's widow Vilma (Sybille Schmitz, of Vampyr fame) falls in love with handsome mining engineer Baumann (Sigfried Schuerenberg). Ultimately, both Vilma and Baumann must contend with thousands upon thousands of killer robots, who've been programmed to take over all jobs -- and, eventually, the world. Die Herr der Welt was the last of director Harry Piel's quartet of science fiction films, which began in 1915 with Die Gross Wette.
by Hal Erickson synopsis