==Plot==
In his primitive laboratory, somewhere in the Peruvian jungle, mad scientist Alexander Thorkel attempts to shrink all of humanity to reduce impact on the environment. At one point, he summons a team of ace 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 , insisting that he tell them more about his research. While snooping aroundThere, Stevethey discoversdiscover the area is rich with [[Uraninite|pitchblende]], an ore of [[uranium]] and [[radium]]. Thorkel reveals he is shrinking living creatures , among them a horse, using radiation piped in from a radium deposit down a deep shaft. He invites themthe and his assistant Pedro,biologists to examineobserve his apparatus, then locks them inside his radiation chamber . With the information that Bill has provided, he is able to correct the flaw that has killed his prior specimens. When his victims awaken,where they find they haveare shrunk to twelve inches tall.<ref>{{cite book |last =Rovin |first =Jeff |title =The Encyclopedia of Supervillains |publisher =Facts on File |date =1987 |location =New York |isbn = 0-8160-1356-X |pages=87–88}}</ref> ▼
A scientist attempts to shrink all of humanity to reduce impact on the environment. Biologists Dr Mary Robinson and Dr Rupert Bulfinch are summoned by Dr Alexander Thorkel to his remote laboratory in the Peruvian jungle. They are accompanied by mineralogist Bill Stockton (who needs money to pay his debts) and Steve Baker, who wants to make sure his hired mules are well cared for (and suspects Thorkel may have discovered a rich mine). When they arrive, Thorkel asks the scientists to describe a specimen in his microscope, since his eyesight is too poor for him to do so himself. Bill identifies iron crystal contamination, much to Thorkel's satisfaction, who then thanks them for their services and wants them to leave.
WhileLater, when Thorkel goesdiscovers outsidetheir shrunken state is only temporary, he angrily suffocates one of them. The rest flee to adjustthe jungle. He sets out to hunt them down so they cannot expose him to the authorities. After shooting a machine,second Billescapee, Stevethe other minaturized fugitives hide in one of Thorkel’s specimen cases and Maryare preparebrought back undetected to his lab. There, they conspire to kill himThorkel with his own shotgun when he lies down on his bed. When insteadInstead he falls asleep at his desk ,. theyThey do manage to smash one lens from his glasses before he awakes. Thorkel chases the shrunken triogroup to the mineshaft and is left hanging by a rope when thea plank he wasis lying on breaks. SteveOne of them cuts the rope , and Thorkel plunges to his death . In time, when the survivors return to their original size, they travel back to America. ▼
▲Annoyed that they have travelled thousands of miles for nothing, they set up camp in Thorkel's stockade, insisting that he tell them more about his research. While snooping around, Steve discovers the area is rich with [[Uraninite|pitchblende]], an ore of [[uranium]] and [[radium]]. Thorkel reveals he is shrinking living creatures, among them a horse, using radiation piped from a radium deposit down a deep shaft. He invites them and his assistant Pedro, to examine his apparatus, then locks them inside his radiation chamber. With the information that Bill has provided, he is able to correct the flaw that has killed his prior specimens. When his victims awaken, they find they have shrunk to twelve inches tall.<ref>{{cite book |last =Rovin |first =Jeff |title =The Encyclopedia of Supervillains |publisher =Facts on File |date =1987 |location =New York |isbn = 0-8160-1356-X |pages=87–88}}</ref>
They flee from Thorkel and are saved from his cat Satanus, by Pedro's dog Tipo. Bulfinch is eventually coaxed into speaking with Thorkel, but the latter is not interested in negotiating, merely in measuring Bulfinch. When he discovers that Bulfinch is growing, he realizes that the effect is only temporary. He murders Bulfinch and sets out to hunt the others down so that they cannot go to the authorities.
The four survivors hack their way through gigantic jungle foliage and do battle with the wildlife. They attempt to launch Pedro's boat (now enormous in their eyes), but are attacked by a [[caiman]]. When Thorkel locates them using Pedro's dog, Pedro leads Thorkel away from the others and is shot dead. The fugitives hide in one of Thorkel’s specimen cases and are brought back undetected to his lab.
▲While Thorkel goes outside to adjust a machine, Bill, Steve and Mary prepare to kill him with his own shotgun when he lies down on his bed. When instead he falls asleep at his desk, they manage to smash one lens from his glasses before he awakes. Thorkel chases the shrunken trio to the mineshaft and is left hanging by a rope when the plank he was lying on breaks. Steve cuts the rope and Thorkel plunges to his death.
Months later, Bill, Steve and Mary return to civilization, restored to their original size.
==Cast==
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