After a car accident involving some gangsters, scientist Boris Karloff put the brain of a gangster into the body of professor Stanley Ridges. Ridges slowly turns into the gangster and seeks revenge on crime boss Bela Lugosi. Boris uses Ridges to find the gangsters’ hidden loot so he can get more science equipment. Everyone double-crosses everyone in this crime / Sci-Fi / melodrama. Karloff gets the electric chair in the end. Lugosi was actually hypnotized on the set before filming his death scene to make it more real and unfortunately doesn’t share any scenes with Karloff. Director Arthur Lubin also directed many Abbott and Costello movies.