The Invisible Ray

Plot Summary

Dr. Janos Rukh discovers a certain type of radium that has almost magical healing properties. But the element has a dangerous side, too, and it has already started affecting Rukh. Consumed by paranoia, he begins to suspect that his wife is having an affair. Wild for revenge, Rukh hatches a deadly plot...using his own poisoned body as a weapon to kill.

Top Cast

Boris Karloff Dr. Janos Rukh

Bela Lugosi Dr. Felix Benet

Frank Lawton Ronald Drake

Frances Drake Diana Rukh

Violet Kemble Cooper Mother Rukh