Comic Title: Challengers of the Unknown #1
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: Apr/May 1958
On Sale Date: February 11, 1958 Copyright Date February 11, 1958
Source: Library of Congress, Periodicals 1958

Frequency: Bi-monthly
Cover Price: $0.10
Page Count: 32
Editor: Jack Schiff

Title: "The Man Who Tampered with Infinity"
Pages: 14

Feature(s):
Challengers of the Unknown (of Earth-1)

Writer/Penciller: Jack Kirby
Inker: Marvin Stein

Reprinted In:
Challengers of the Unknown Archives Vol. 1 HC (2003)
Showcase Presents Challengers of the Unknown Vol. 1 TPB (2006)
Challengers of the Unknown Omnibus HC (2012)
Challengers of the Unknown by Jack Kirby TPB (2018)

Feature Character(s)

• Challengers of the Unknown (last appearance in Showcase #12; next appearance in Challengers of the Unknown #1)
• Ace Morgan (last appearance in Showcase #12; next appearance in Challengers of the Unknown #1)
• Prof. Haley (last appearance in Showcase #12; next appearance in Challengers of the Unknown #1)
• Red Ryan (last appearance in Showcase #12; next appearance in Challengers of the Unknown #1)
• Rocky Davis (last appearance in Showcase #12; next appearance in Challengers of the Unknown #1)

Supporting Character(s)

• June Robbins (last appearance in Showcase #7; next appearance in Challengers of the Unknown #2)

Villain(s)

• Olan Tagorian and his men (no further appearances)

Comments:
June Robbins in mistakenly referred to as June Walker in this story.

Synopsis:
The Challengers investigate a series of robberies in which the thieves escape via teleportation. The Challs set a trap for the crooks, but they are transported back to the gang's hide-out and captured.

The crooks are led by criminal scientist Olan Tagorian. Tagorian has stolen devices to build a machine capable of transporting alien creatures to Earth. He brings two creatures to his lab, but they break free and threaten the world.

During the fight in Tagorian's lab, the Challengers escape. They then track down the creatures and use Tagorian's device to transport them back into space. Tagorian's lab and equipment is destroyed, preventing similar accidents in the future.