This third film version of the Curt Siodmak scare piece Donovan's Brain stars Peter Van Eyck as an overly dedicated scientist. When a powerful and ruthless financier dies in a plane crash, Van Eyck keeps the tycoon's brain alive in his laboratory. Gradually, the brain takes over the doctor's mind, forcing him into all sorts of evil chicanery. In a twist not found in the Siodmak original, the brain compels Van Eyck to seek out the financier's murderer. Anne Heywood costars as the dead man's daughter. A strong mulinational supporting cast distinguishes this Anglo-German coproduction.
by Hal Erickson synopsis