Really good horror flick featuring to of the greatest, Boris Karloff and Bela Lugosi. Dr. Janos Rukh(Karloff)is on an expedition in Africa trying to find an ancient meteorite. After finding it, Rukh is poisoned by the its radiation. All he touches dies and the dark side of Rukh makes him become an egotistic murderer. His friend, Dr. Felix Benet(Lugosi)finds a limited remedy to the problem and at the same time realizes the radiation could be used for the good of mankind by curing diseases. The two fiends will battle over the radiations possibilities. Pretty good special effects. Others in the cast: Frances Drake, Frank Lawton, Beulah Bondi and Frank Reicher.