Classic 1940s drama directed by Ernest B. Schoedsack and starring Albert Dekker. Having discovered a precious source of radium in the Peruvian Andes, Dr. Thorkell Dekker begins mining the radioactive substance for use in his experiments. Many of these experiments use radium to shrink various animals taken from the jungle, with Dr. Thorkell observing all of his subjects in their miniature states. This begins to strain Thorkell's eyesight however, and so he summons Dr. Bullfinch Charles Halton and his assistant for their help. When Thorkell no longer needs help, he attempts to send them away, but as they resist he decides to investigate the effects of his shrinking process on humans...