The Invisible Ray

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 ...