Challengers of the Unknown| Image = Challengers of the Unknown 1.jpg| Volume = 1| Issue = 1| Month = May| Year = 1958 | Executive Editor = | CoverArtist1 = Jack Kirby| CoverArtist2 = Marvin Stein | Editor1_1 = | Writer1_1 = Jack Kirby| Penciler1_1 = Jack Kirby| Inker1_1 = Marvin Stein| Writer2_1 = Jack Kirby| Penciler2_1 = Jack Kirby| Inker2_1 = Marvin Stein| Writer3_1 = Jack Kirby| Penciler3_1 = Jack Kirby| Inker3_1 = Marvin Stein| Colourist1_1 = | Letterer1_1 = | PreviousIssue = Showcase #12 | Quotation
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= | Speaker = | StoryTitle1 = "Challengers Introduction"| Synopsis1 = A brief retelling of the Challenger's origins as originally depicted in Showcase #6.| StoryTitle2 = "The Man Who Tampered With Infinity"|
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When scientific equipment is being stole from laboratories, the United States government hires the Challengers to find out who is responsible. When staking out a lab, the Challengers witness men teleport into the lab. In trying to stop them they are all transported back to the thieves base. The thieves are in the employ of Olan Tagorian. Made prisoners along with June Robbins, the Challengers are shown Tagorian's teleportation device and mutated creatures. Gaining the upper hand the Challengers take control of the situation, however things get hairy as the creatures are accidentally released and Tagorian uses his device to send them away. The Challengers then go back out into the world to stop each of the monsters. With the monsters captured, the Challengers uses Tagorian's device to send the creatures into oblivion, they then turn Olan over to the authorities and destroy his mountain base.| StoryTitle3 = "The Human Pets"| Synopsis3 =
When a strange spherical space ship touches down on a farmers field, the Challengers are sent to investigate. Upon their arrival, the Challengers are captured by the ship and shot into space. They end up on an alien world where the inhabitants are gigantic compared to humans. After being subject to the whims of an alien child who treats them as pets, they are sent back to Earth when the alien boy's parents catch the lad with his human play things. | Appearing1 =
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| Notes = * This issue is reprinted in Challengers of the Unknown Archives, Volume 1.| Trivia = | Recommended = | Links = }}