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"Delving into new, strange fields of mystery!". 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.
Movie rating: 6.5 / 10 (2762)
Directed by: John Colton - Lambert Hillyer - Howard Higgin - Douglas Hodges
Writer credits: Howard Higgin - Douglas Hodges
Cast: Boris Karloff - Bela Lugosi - Frances Drake - Frank Lawton - Violet Kemble Cooper
AKA: Le rayon invisible
