Data courtesy of the Grand Comics Database under Creative Commons license.

Issue Details

Issue #3
Published August-September 1958
Cover Price 0.10 USD
Pages 36
Editing Jack Schiff
Notes Learn more about the Challengers at www.challengersoftheunknown.com. Credits updated 10/06 by Bob Hughes. Previously inker listed as Marvin Stein. Per Stein's conversations with Greg Theakston, he did not ink any Challengers stories. Greg Theakston confirmed cover ink credit (October 4, 2006).

Cover Details - "The Invincible Challenger!"

Characters Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins
Genre Adventure
Pencils Jack Kirby
Inks Jack Kirby; Roz Kirby (blacks)
Notes Learn more about the Challengers at www.challengersoftheunknown.com. Credits updated 10/06 by Bob Hughes. Previously inker listed as Marvin Stein. Per Stein's conversations with Greg Theakston, he did not ink any Challengers stories. Greg Theakston confirmed cover ink credit (October 4, 2006).
Reprinted in Challengers of the Unknown Archives (DC, 2003 series) #2 (May 2004); in Showcase Presents Challengers of the Unknown (DC, 2006 series) #1

12 page Challengers of the Unknown story "The Secret of the Sorcerer's Mirror"

Characters Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Kregon the Sorcerer; a genie; Hillary Mycroft and his gang
Synopsis The Challengers are summoned to a museum. A mirror and chart have been stolen by Hillary Mycroft and his gang. The mirror was fashioned by Kregon the Sorcerer to show where "the ancients" hid their most potent secrets. The chart shows where the secrets are hidden. The Challengers break into Mycroft's hideout, but Mycroft gets away in a plane. Prof tests the mirror and reveals three destinations: the sea bottom, a stone needle, and Sinbad's Island. The boys split up. Prof dives in the sea and finds Mycroft's thugs stealing the prize: a gold ball with rods stuck through it. A sea serpent attacks. Prof jiggles a rod. Gaseous hands hurl the serpent away. Meanwhile, Red climbs the dangerous needle prominence and finds the second gold ball with rods. In a dream, a genie warns him to descend through hidden caves. Red meets Mycroft's thugs, who steal the ball - but Red keeps one rod. Rocky and Ace fly to Sinbad's Island and find Mycroft and the gold ball, when they're seized by a roc: a giant bird! Ace jiggles a rod. A gaseous armored torso appears. The roc flies off and the boys float to safety. Mycroft explains: the three balls hooked together will summon a genie! Mycroft assembles the globes, but they explode! Red, unseen, pulled a single rod and bollixed the assembly!
Genre Adventure
Script Dave Wood?
Pencils Jack Kirby
Inks Jack Kirby?; Roz Kirby (blacks)
Notes Credits updated 10/06 by Bob Hughes. Previously inker listed as Marvin Stein. Per Stein's conversations with Greg Theakston, he did not ink any Challengers stories.
Reprinted in Challengers of the Unknown (DC, 1958 series) #76; in Challengers of the Unknown Archives (DC, 2003 series) #2 (May 2004); in Showcase Presents Challengers of the Unknown (DC, 2006 series) #1

13 page Challengers of the Unknown story "The Menace of the Invincible Challenger"

Characters Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; June Robbins (called June Walker); Professor Curtis; Chopper; Roxie
Synopsis The Challengers and June have been summoned to a lab. A monkey shows super abilities. It was given a pill derived from a meteorite, then boosted into space. The Challengers draw straws. Rocky takes the pill and rockets into space - unaware the monkey has lapsed into a coma. The rocket crashes. Rocky emerges with super powers, but is insane! He brushes off his fellows with freeze rays, super strength, and invisibility. The Challengers broadcast a warning that Rocky is dangerous. A crook named Chopper takes Rocky in: with his super-help, they can rob banks. But Chopper's lies can't overcome Rocky's basic decency. He refuses to kill a nearby hunter. When the Challengers and June appear, and crooks would shoot, Rocky shocks them. He's grazed by a bullet as the Challengers pound the thugs. Rocky recovers his memory, and his powers have faded. "This assignment was one big headache."
Genre Adventure
Script Dave Wood?
Pencils Jack Kirby
Inks Jack Kirby?; Roz Kirby (blacks)
Notes This story is considered a dry run for Fantastic Four #1. Rocky is shot into space, crashes, then exhibits super-strength, invisibility, fire powers, and giant growth. Credits updated 10/06 by Bob Hughes. Previously inker listed as Marvin Stein. Per Stein's conversations with Greg Theakston, he did not ink any Challengers stories.
Reprinted in Challengers of the Unknown Archives (DC, 2003 series) #2 (May 2004); in Showcase Presents Challengers of the Unknown (DC, 2006 series) #1