DR. CYCLOPS

In his primitive laboratory somewhere in the Peruvian jungle, mad scientist Alexander Thorkel attempts to shrink all of humanity to reduce its impact on the environment. At one point, he summons a team of expert biologists from America to examine a specimen in his microscope, since his eyesight is too poor for him to do so himself. One of them identifies iron crystal contamination, much to Thorkel's satisfaction. He then thanks them for their services and asks them to leave. Annoyed that they have travelled thousands of miles for nothing, they set up camp in Thorkel's stockade. There, they discover the area is rich with pitchblende, an ore of uranium and radium. Thorkel reveals he is shrinking living creatures, using radiation piped in from a radium deposit down a deep shaft. He invites the biologists to observe his apparatus, then locks them inside his radiation chamber, where they are shrunk to twelve inches in height.

Later, when Thorkel discovers their shrunken state is only temporary, he angrily suffocates one of them. The rest flee into the jungle. He sets out to hunt them down so they cannot report him to the authorities. After he shoots one of them, the other fugitives hide in one of Thorkel's specimen cases and are brought back undetected to his lab. There, they conspire to kill Thorkel with his own shotgun when he lies down on his bed. Instead he falls asleep at his desk. They do manage to smash one lens of his glasses before he awakens. Thorkel chases the shrunken group to the mineshaft and is left hanging by a rope when a plank he is lying on breaks. One of them cuts the rope, and Thorkel plunges to his death. In time, the survivors are restored to their original size and begin their trek back to America.

The surviving shrunken scientists and explorers manage to outwit Dr. Thorkel, ultimately leading to his demise and their escape from his grasp.

The ending underscores the triumph of ingenuity and cooperation over unchecked scientific hubris. Thorkel’s obsession with control and experimentation becomes his undoing, while the victims' resourcefulness allows them to overcome both their miniature predicament and the dangers of the jungle. The resolution serves as a warning about the perils of playing god with science.