The Invisible Ray (1936)

The Invisible Ray is a 1936 American horror film and is one of Universal's pairings of Boris Karloff and Bela Lugosi.

Plot
A scientist becomes murderous after being exposed to the radiation of a new and undiscovered element.

Cast

 * Boris Karloff as Dr. Janos Rukh
 * Bela Lugosi as Dr. Felix Benet
 * Frances Drake as Diana Rukh
 * Frank Lawton as Ronald Drake
 * Violet Kemble Cooper as Mother Rukh
 * Walter Kingsford as Sir Francis Stevens
 * Beulah Bondi as Lady Arabella Stevens
 * Frank Reicher as Professor Meiklejohn
 * Paul Weigel as Monsieur Noyer
 * Georges Renavent as Chief of the Surete