Main Cast: Bela Lugosi, Frances Drake, Frank Lawton, Walter Kingsford
Release Year: 1936
Country: US
Run Time: 82 minutes
Plot
The last of Universal's three Boris Karloff-Bela Lugosi teamings of the mid-1930s, The Invisible Ray is dominated by Karloff as Dr. Janos Rukh, the inventor of a laser-like heat ray. Despite the scoffing of his colleagues, Rukh intends to use the ray for the benefit of mankind, but first he requires a new element called "Radium X" to perfect his invention. Before long, he has embarked upon an expedition to Africa in search of a radium source, accompanied by his beautiful young wife Diane (Frances Drake), handsome young scientist Ronald Drake (Frank Lawton) and financiers Sir Francis and Lady Arabella Stevens (Walter Kingsford, Beulah Bondi). His system poisoned by increased exposure to radium, Rukh begins acting strangely, virtually forcing Diane into Ronald's arms. Apparently killed during the expedition, Rukh is actually alive, dementedly determined to use his "invisible" radium ray to do away with all his enemies. Soon he is able to kill with the mere touch of his hand, and this is how he disposes of his severest critic (and greatest supporter), humanitarian doctor Benet (Bela Lugosi). Rukh later tries to kill Diane as well but is unable to go through with it. The mad doctor meets his Waterloo when he is confronted by his own avenging-angel mother (Violet Kemble-Cooper). Not as lively as previous Karloff-Lugosi efforts, The Invisible Ray is nonetheless an effective melodrama. ~ Hal Erickson, All Movie Guide
A visionary doctor, Dr. Janos Rukh (Karloff) invents a telescope that can look far out into space — into Andromeda — and pick up rays of light that will show the Earth's past. Looking at the past on a television-like screen, a group of assembled doctors as well as Dr. Rukh see a large meteor hit the earth thousands of years ago. Rukh convinces the doctors to go on an expedition to find the meteor that appeared to land in Africa. While in Africa, Rukh finds the meteor but is exposed to strong radiation ("Radium X") from the rock. Dr. Benet (Lugosi) takes a piece of the stone back to Europe and uses the meteorite to heal people, including curing the blind. Rukh, suffering from the radiation, glows at night when not treated and is slowly losing his mind.
The film features music by film composer Franz Waxman.
