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Published April-May 1958 by DC
The Man Who Tampered With Infinity
Jack Kirby
Jack Kirby
Jack Kirby
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins (called June Walker); Olan Tagorian
"The Man Who Tampered With Infinity"
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Published April-May 1958 by DC

Issue Details

Story Title
The Man Who Tampered With Infinity
Writer
Jack Kirby
Interior Art
Jack Kirby
Cover Art
Jack Kirby
Character Appearances
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins (called June Walker); Olan Tagorian
Storyline
"The Man Who Tampered With Infinity"

Other Story

Story Title
The Human Pets
Script
Jack Kirby
Pencils
Jack Kirby
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.
Published June-July 1958 by DC
The Monster Maker
Dave Wood ?; Jack Kirby ? (see notes)
Jack Kirby
Jack Kirby
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Dr. Hascomb; Roc
"The Monster Maker" The Challengers pursue Roc, a would-be conqueror. Using "mind over matter", Roc runs them off by mentally conjuring a giant ape and missile. Fighting fire with fire, the scientist who created the mind-over-matter machine gives Ace similar powers. They battle with a conjured dragon, knight, giant vacuum cleaner, mirrors, and more. Finally Ace uses spinning circles to hypnotize and capture Roc.
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Published June-July 1958 by DC

Issue Details

Story Title
The Monster Maker
Writer
Dave Wood ?; Jack Kirby ? (see notes)
Interior Art
Jack Kirby
Cover Art
Jack Kirby
Character Appearances
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Dr. Hascomb; Roc
Storyline
"The Monster Maker" The Challengers pursue Roc, a would-be conqueror. Using "mind over matter", Roc runs them off by mentally conjuring a giant ape and missile. Fighting fire with fire, the scientist who created the mind-over-matter machine gives Ace similar powers. They battle with a conjured dragon, knight, giant vacuum cleaner, mirrors, and more. Finally Ace uses spinning circles to hypnotize and capture Roc.

Other Story

Story Title
The Traitorous Challenger
Script
Dave Wood ?; Jack Kirby ? (see notes)
Pencils
Jack Kirby
Story Line
A prospector uncovers a monster, an indestructible one-eyed walking box that tramples villages. The Challengers's weapons don't make a dent. And June mysteriously sabotages their efforts! Prof finally guesses the monster's one eye is solar-powered. Pursued until sunset, the monster expires. June had run a computer program that predicted the Challengers would die, hence her sabotage. But her efforts changed the equation, so she saved the day!
Data courtesy of the Grand Comics Database under Creative Commons license.
Published August-September 1958 by DC
The Secret of the Sorcerer's Mirror
Dave Wood ?; Jack Kirby ? (see notes)
Jack Kirby
Jack Kirby
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Kregon the Sorcerer; a genie; Hillary Mycroft and his gang
"The Secret of the Sorcerer's Mirror" A mirror and chart have been stolen from a museum 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 he escapes in a plane. The mirror reveals three destinations: the sea bottom, a stone needle, and Sinbad's Island. The team split up and face an array of threats. Mycroft finally acquires the globes that, when assembled will summon a genie but Red secretly extracted a rod causing the globes destruction.
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Published August-September 1958 by DC

Issue Details

Story Title
The Secret of the Sorcerer's Mirror
Writer
Dave Wood ?; Jack Kirby ? (see notes)
Interior Art
Jack Kirby
Cover Art
Jack Kirby
Character Appearances
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Kregon the Sorcerer; a genie; Hillary Mycroft and his gang
Storyline
"The Secret of the Sorcerer's Mirror" A mirror and chart have been stolen from a museum 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 he escapes in a plane. The mirror reveals three destinations: the sea bottom, a stone needle, and Sinbad's Island. The team split up and face an array of threats. Mycroft finally acquires the globes that, when assembled will summon a genie but Red secretly extracted a rod causing the globes destruction.

Other Story

Story Title
The Menace of the Invincible Challenger
Script
Dave Wood ?; Jack Kirby ? (see notes)
Pencils
Jack Kirby
Story Line
Summoned to a lab the Challs observe a monkey with super abilities. It was given a pill derived from a meteorite, then boosted into space. Rocky is chosen to take the pill and rockets into space unaware the monkey has lapsed into a coma. The rocket crashes and Rocky emerges with super powers, including freeze rays, super strength and invisibility but becomes irrational. A crook takes Rocky in hoping to use him to rob banks. Rocky's basic decency wins out and when the Challengers and June appear Rocky shocks the crooks. Grazed by a bullet Rocky recovers his memory and his powers wear off.
Data courtesy of the Grand Comics Database under Creative Commons license.
Published October-November 1958 by DC
The Wizard of Time
Jack Kirby
Jack Kirby
Jack Kirby
Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; Professor Harlan Fuller; Rhamis; Nostradamus; Darius Tiko; A Greek oracle; The Sorceror's Sect; The United Earth Police
"The Wizard of Time" An airplane is stolen by ancient Greek soldiers and the Challengers are brought in to investigate. They encounter Darius Tiko who experiments with time travel. He disappears in a time cube but The Challengers follow, chasing him through the centuries, eventually finding themselves in 3,000 AD. The Challs find Tiko stealing futuristic weapons, planning to conquer the 20th Century. The police take them all in to face a mind-reading robot judge who pronounces the Challs innocent and Tiko guilty, sending him back to the present with the Challengers to face justice.
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Published October-November 1958 by DC

Issue Details

Story Title
The Wizard of Time
Writer
Jack Kirby
Interior Art
Jack Kirby
Cover Art
Jack Kirby
Character Appearances
Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; Professor Harlan Fuller; Rhamis; Nostradamus; Darius Tiko; A Greek oracle; The Sorceror's Sect; The United Earth Police
Storyline
"The Wizard of Time" An airplane is stolen by ancient Greek soldiers and the Challengers are brought in to investigate. They encounter Darius Tiko who experiments with time travel. He disappears in a time cube but The Challengers follow, chasing him through the centuries, eventually finding themselves in 3,000 AD. The Challs find Tiko stealing futuristic weapons, planning to conquer the 20th Century. The police take them all in to face a mind-reading robot judge who pronounces the Challs innocent and Tiko guilty, sending him back to the present with the Challengers to face justice.
Data courtesy of the Grand Comics Database under Creative Commons license.
Published December 1958-January 1959 by DC
The Riddle of the Star-Stone
Jack Kirby ?
Jack Kirby
Jack Kirby
Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; June Robbins; Professor Brandon; Vreedl; Vreedl's gang
"The Riddle of the Star-Stone" An archaeology assistant, Vreedl, steals the Star-Stone created by an ancient sorcerer. By turn he's a flame man, bird man, fish man, stealing as he goes. The Challengers pursue Vreedl through South America, India, and the Bay of Sharks. When Vreedl finds the fourth stone, he becomes super and invincible. Whipped, Ace notes his powers derive from the Star-Stone: someone else could become super. Vreedl smashes the stone - and his powers evaporate!
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Published December 1958-January 1959 by DC

Issue Details

Story Title
The Riddle of the Star-Stone
Writer
Jack Kirby ?
Interior Art
Jack Kirby
Cover Art
Jack Kirby
Character Appearances
Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; June Robbins; Professor Brandon; Vreedl; Vreedl's gang
Storyline
"The Riddle of the Star-Stone" An archaeology assistant, Vreedl, steals the Star-Stone created by an ancient sorcerer. By turn he's a flame man, bird man, fish man, stealing as he goes. The Challengers pursue Vreedl through South America, India, and the Bay of Sharks. When Vreedl finds the fourth stone, he becomes super and invincible. Whipped, Ace notes his powers derive from the Star-Stone: someone else could become super. Vreedl smashes the stone - and his powers evaporate!
Data courtesy of the Grand Comics Database under Creative Commons license.
Published February-March 1959 by DC
Captives of the Space Circus
Dave Wood; Jack Kirby
Jack Kirby
Jack Kirby
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; captive aliens; Tartan the Ringmaster; the Stupendous Interplanetary Circus
"Captives of the Space Circus" The Challengers answer a shipwreck distress call, but find it's a trap. They're pulled through space on a light beam and made captives of a rocket ship space circus. The heroes are prodded through cages and catapulted into a tank to fight Quadro, the Four-Finned Demons. Other alien performers are also captives. As the Challengers prepare for a last stand, Prof learns the atmosphere gives them super-strength. They bombard the circus guards with boulders and disable the ships. The aliens are surprised to learn the circus owners are criminals and promise to send all the captives home.
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Published February-March 1959 by DC

Issue Details

Story Title
Captives of the Space Circus
Writer
Dave Wood; Jack Kirby
Interior Art
Jack Kirby
Cover Art
Jack Kirby
Character Appearances
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; captive aliens; Tartan the Ringmaster; the Stupendous Interplanetary Circus
Storyline
"Captives of the Space Circus" The Challengers answer a shipwreck distress call, but find it's a trap. They're pulled through space on a light beam and made captives of a rocket ship space circus. The heroes are prodded through cages and catapulted into a tank to fight Quadro, the Four-Finned Demons. Other alien performers are also captives. As the Challengers prepare for a last stand, Prof learns the atmosphere gives them super-strength. They bombard the circus guards with boulders and disable the ships. The aliens are surprised to learn the circus owners are criminals and promise to send all the captives home.

Other Story

Story Title
The Sorceress of Forbidden Valley
Script
Ed Herron; Jack Kirby
Pencils
Jack Kirby
Story Line
June Robbins crash-lands on an uncharted island and finds an Aladdin's lamp in a cave. Lighting it creates fumes that overpower her. The Challengers track June down, discovering a hidden valley where they are attacked. They find June under a spell and with magical powers, controlled by Charles Agar, a criminal from the states.

Other Story

Story Title
Ghostly Miners
Script
Morris Waldinger
Pencils
Morris Waldinger
Story Line

Other Story

Story Title
"I packed a nice lunch! Let's go on a picnic!"
Script
Henry Boltinoff (signed)
Pencils
Henry Boltinoff (signed)
Story Line

Other Story

Story Title
"A real robot! I finally finished it!"
Script
Henry Boltinoff
Pencils
Henry Boltinoff
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.
Published April-May 1959 by DC
The Isle of No Return
Jack Kirby; France Herron
Jack Kirby
Jack Kirby
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins
"The Isle of No Return" After hearing a television report about a burglar with the ability to walk through walls, the Challengers patrol the city with honorary member June Robbins accompanying them. They arrive too late to stop another robbery but pursue the thief, Anton Zammer, to his hideout, an abandoned laboratory owned by the late Prof. Macon, who left behind a number of inventions Zammer intends to use for his own gain. Zammer uses a shrinking ray to capture and cage the Challs, but June escapes the same fate, assisting the team in returning to their normal size and capturing Zammer.
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Published April-May 1959 by DC

Issue Details

Story Title
The Isle of No Return
Writer
Jack Kirby; France Herron
Interior Art
Jack Kirby
Cover Art
Jack Kirby
Character Appearances
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins
Storyline
"The Isle of No Return" After hearing a television report about a burglar with the ability to walk through walls, the Challengers patrol the city with honorary member June Robbins accompanying them. They arrive too late to stop another robbery but pursue the thief, Anton Zammer, to his hideout, an abandoned laboratory owned by the late Prof. Macon, who left behind a number of inventions Zammer intends to use for his own gain. Zammer uses a shrinking ray to capture and cage the Challs, but June escapes the same fate, assisting the team in returning to their normal size and capturing Zammer.

Other Story

Story Title
The Beasts from Planet Nine
Script
Jack Kirby; France Herron
Pencils
Jack Kirby
Story Line
Alerted by a friend to the discovery of a crashed spaceship, the Challengers investigate and find three alien creatures that had been held captive in that ship. The Challengers see if they have enough borrowed time to get the creatures back in their cages.

Other Story

Story Title
"Oh, boy! It's always a great relief to put away the lawn mower"
Script
Henry Boltinoff
Pencils
Henry Boltinoff
Story Line

Other Story

Story Title
"I'd better hurry"
Script
Henry Boltinoff
Pencils
Henry Boltinoff
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.
Published June-July 1959 by DC
The Man Who Stole the Future
Dave Wood; Jack Kirby
Jack Kirby
Jack Kirby
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins; Marie; Drabny
"The Man Who Stole the Future" June's friend Marie comes to meet the Challengers to ask them to investigate weird events in her home country of Mordania. There they meet and fight the evil Drabny, whose scientific inventions have enabled him to take over Mordania.
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Published June-July 1959 by DC

Issue Details

Story Title
The Man Who Stole the Future
Writer
Dave Wood; Jack Kirby
Interior Art
Jack Kirby
Cover Art
Jack Kirby
Character Appearances
Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins; Marie; Drabny
Storyline
"The Man Who Stole the Future" June's friend Marie comes to meet the Challengers to ask them to investigate weird events in her home country of Mordania. There they meet and fight the evil Drabny, whose scientific inventions have enabled him to take over Mordania.

Other Story

Story Title
The Prisoners of Robot Planet
Script
Jack Kirby ?
Pencils
Jack Kirby
Story Line

Other Story

Story Title
"Am I glad we finally quit that rodeo, Slim!"
Script
Irwin Hasen
Pencils
Irwin Hasen
Story Line

Other Story

Story Title
"I'm glad you dropped in, Prof. Eureka!"
Script
Henry Boltinoff (signed)
Pencils
Henry Boltinoff (signed)
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.
Published August-September 1959 by DC
The Plot to Destroy Earth
Ed Herron ?
Bob Brown
Bob Brown
Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; three alien creatures; three robots.
"The Plot to Destroy Earth" The Challengers stumble upon an alien plot to dismantle the Earth. A mole-creature will slice the Earth apart. A sea monster will hold back the seas. A flying creature will trap the air, and pie-shaped slices of Earth will be stolen by a robotic ship! Ace jets to the ship and finds it's on auto-pilot, run by robots for a long-dead race. The Challengers attack the creatures without success, until they inflate huge balloons that simulate the creatures dying. The robots abort the mission as a failure and depart.
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Published August-September 1959 by DC

Issue Details

Story Title
The Plot to Destroy Earth
Writer
Ed Herron ?
Interior Art
Bob Brown
Cover Art
Bob Brown
Character Appearances
Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; three alien creatures; three robots.
Storyline
"The Plot to Destroy Earth" The Challengers stumble upon an alien plot to dismantle the Earth. A mole-creature will slice the Earth apart. A sea monster will hold back the seas. A flying creature will trap the air, and pie-shaped slices of Earth will be stolen by a robotic ship! Ace jets to the ship and finds it's on auto-pilot, run by robots for a long-dead race. The Challengers attack the creatures without success, until they inflate huge balloons that simulate the creatures dying. The robots abort the mission as a failure and depart.

Other Story

Story Title
The Men Who Lost Their Memories
Script
Ed Herron?
Pencils
Bob Brown
Story Line
When a villain named Dekkar uses a machine to steal the Challengers' memories, June Robbins must show her amnesiac friends how to defeat their foe. Goading them, she makes them recall their mountain climbing, diving, and other skills. Feigning amnesia, the Challengers get into the villains' castle to fight. June inserts the memory disk into the machine, hits reverse, and restores the guys' memories.

Other Story

Story Title
"I think I've got this new atomic gunpowder perfected."
Script
?
Pencils
Henry Boltinoff (signed)
Story Line
Shorty creates "atomic gunpowder".
Data courtesy of the Grand Comics Database under Creative Commons license.
Published October-November 1959 by DC
The Four Faces of Doom
Dave Wood ?
Bob Brown
Bob Brown
"The Four Faces of Doom"
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Published October-November 1959 by DC

Issue Details

Story Title
The Four Faces of Doom
Writer
Dave Wood ?
Interior Art
Bob Brown
Cover Art
Bob Brown
Storyline
"The Four Faces of Doom"

Other Story

Story Title
The Cave-Man Beast
Script
Ed Herron
Pencils
Bob Brown
Story Line

Other Story

Story Title
"This ancient city is rumored to have been haunted."
Script
Henry Boltinoff
Pencils
Henry Boltinoff
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.
Published December-January 1960 by DC
Creatures from the Forbidden World
France Ed Herron?
Bob Brown
Bob Brown
"Creatures from the Forbidden World"
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Published December-January 1960 by DC

Issue Details

Story Title
Creatures from the Forbidden World
Writer
France Ed Herron?
Interior Art
Bob Brown
Cover Art
Bob Brown
Storyline
"Creatures from the Forbidden World"

Other Story

Story Title
Planets of Wonder!
Script
?
Pencils
?
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.
Published February-March 1960 by DC
The Challenger from Outer Space
Ed Herron
Bob Brown
Bob Brown
Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan]; S'ntaga; Krandanians; alien giants
"The Challenger from Outer Space" S’Ntaga is the Superman of the planet Krandan. Four-armed alien giants ravage his world, but he chases them off and follows them to Earth. The giants blast land, towns, and property on Earth. The Challengers can’t stop them, and Prof is blasted, near death. S’Ntaga arrives and plunks Prof in suspended animation, then a revitalizing machine. The heroes discover the aliens build a diabolical machine inside a force field: they’re renegades out to conquer their home world. S’Ntaga’s weapons don’t work here. But Prof returns, so “revitalized” he has super-strength. Using Prof as a battering ram, S’Ntaga breaches the force field, plants a hyper-bomb, and blows up the renegades and their machine. Prof’s powers will wear off in time, and S’Ntaga returns to his home world.
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Published February-March 1960 by DC

Issue Details

Story Title
The Challenger from Outer Space
Writer
Ed Herron
Interior Art
Bob Brown
Cover Art
Bob Brown
Character Appearances
Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan]; S'ntaga; Krandanians; alien giants
Storyline
"The Challenger from Outer Space" S’Ntaga is the Superman of the planet Krandan. Four-armed alien giants ravage his world, but he chases them off and follows them to Earth. The giants blast land, towns, and property on Earth. The Challengers can’t stop them, and Prof is blasted, near death. S’Ntaga arrives and plunks Prof in suspended animation, then a revitalizing machine. The heroes discover the aliens build a diabolical machine inside a force field: they’re renegades out to conquer their home world. S’Ntaga’s weapons don’t work here. But Prof returns, so “revitalized” he has super-strength. Using Prof as a battering ram, S’Ntaga breaches the force field, plants a hyper-bomb, and blows up the renegades and their machine. Prof’s powers will wear off in time, and S’Ntaga returns to his home world.

Other Story

Story Title
The Three Clues to Sorcery
Script
Ed Herron ?
Pencils
Bob Brown
Story Line
June Robbins helps Dr. Fenton in animal research in Africa. One night a monkey grows huge (she’s told), bursts from the lab, and escapes. June calls in the Challengers. They’re inspecting their new headquarters, Challenger Mountain, when the call comes. They find June a hostage in a cage! Dr. Fenton demands the Challengers find three artifacts scattered fairly close: a chest atop a mountain, a bottle beneath the sea, and a ruby from an idol’s forehead. They were made by an ancient alchemist and grant fabulous power, etc. The boys trot off. Red tries to scale the mountain, but falls and is injured. Ace rescues him with a balloon. They find the chest, but it looks suspiciously new. Off the coast, Prof skirts sharks to find the bottle, but is nabbed by an octopus. He stirs up the water so the sharks attack the octopus, and escapes. But the bottle looks new. Rocky ducks natives to steal the ruby from an idol in a temple, but is grabbed by a gorilla! He wrestles free and escapes. The guys compare stories, then deliver the items to Dr. Fenton. But June has already picked the lock and escaped! Ace tests a theory, and unscrews the ruby into two halves. It fires tremendous bursts of solar energy: it’s a solar battery. The guys pound Fenton’s two assistants. Dr. Fenton shoots at Ace but smashes one half of the ruby. The power’s lost, and the bad guys go to jail.

Other Story

Story Title
"Hamid, the Sultan can't fall asleep nights."
Script
Henry Boltinoff
Pencils
Henry Boltinoff
Story Line

Other Story

Script
?
Pencils
?
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.
Published April-May 1960 by DC
The Prisoner of the Tiny Space Ball
France Ed Herron
Bob Brown
Bob Brown
Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan]; Zanna; Vraba; Benrun; Ak-Selians; Dakyab; Dakyab's gang
"The Prisoner of the Tiny Space Ball" A tiny rocket ship lands near Challenger Mountain. Inside Prof finds a tiny gold ball. Which is snatched by an alien spaceman, who runs for his own spaceship! Prof tackles him. X-rays show a tiny man inside. The ball pops open and the prisoner expands to normal size. He is Zanna, former ruler of the planet Ak-Sel. He was overthrown by an insurgent, Dakyah, shrunk, and exiled into space. In the would-be thief’s spaceship, the Challengers and Zanna fly to Ak-Sel. Zanna’s underground fighters hide in an extinct volcano. But Dakyah’s troops attack. Blacking out the complex, Zanna’s fighters and the Challengers fly to a floating island, one of many. Dakyah plans an attack from his palace. The Challengers counter-attack. With precision flying, they float the entire island over the palace and attack in jet-sleds! The Challengers blow up the main defenses and land. Zanna’s army overruns the palace. Victory! Where’s Dakyah? Trapped in a tiny space ball! He hoped to escape and be rescued later. The Challengers, their help greatly appreciated, will be flown back to Earth.
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Published April-May 1960 by DC

Issue Details

Story Title
The Prisoner of the Tiny Space Ball
Writer
France Ed Herron
Interior Art
Bob Brown
Cover Art
Bob Brown
Character Appearances
Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan]; Zanna; Vraba; Benrun; Ak-Selians; Dakyab; Dakyab's gang
Storyline
"The Prisoner of the Tiny Space Ball" A tiny rocket ship lands near Challenger Mountain. Inside Prof finds a tiny gold ball. Which is snatched by an alien spaceman, who runs for his own spaceship! Prof tackles him. X-rays show a tiny man inside. The ball pops open and the prisoner expands to normal size. He is Zanna, former ruler of the planet Ak-Sel. He was overthrown by an insurgent, Dakyah, shrunk, and exiled into space. In the would-be thief’s spaceship, the Challengers and Zanna fly to Ak-Sel. Zanna’s underground fighters hide in an extinct volcano. But Dakyah’s troops attack. Blacking out the complex, Zanna’s fighters and the Challengers fly to a floating island, one of many. Dakyah plans an attack from his palace. The Challengers counter-attack. With precision flying, they float the entire island over the palace and attack in jet-sleds! The Challengers blow up the main defenses and land. Zanna’s army overruns the palace. Victory! Where’s Dakyah? Trapped in a tiny space ball! He hoped to escape and be rescued later. The Challengers, their help greatly appreciated, will be flown back to Earth.

Other Story

Story Title
The Creatures from the Past
Script
Dave Wood ?
Pencils
Bob Brown
Story Line
Off the island of Colchis near Greece, Dr. Henry has a recently-uncovered volume that claims the Golden Fleece was real. June has been helping. The party lands near ruins and splits up to search. Rocky falls into a cellar and finds the Golden Fleece! He dons it to climb out. But feels dizzy... Searching, the Challengers spot Rocky in the fleece. He runs - and a flame-breathing dragon charges, then vanishes. Dr. Henry guesses Rocky is “trapped in the fleece’s powers” and summons mythical creatures from a “never-never land.” An ancient vase of fluid might be important. Hunting Rocky, the Challengers are grabbed by a cyclops! Ace recalls its weakness is vision. He grabs a beehive and pitches it. Assailed by bees, the cyclops hides in a grotto. Dr. Henry and June have deciphered that the fluid changes gold to base metals - it can destroy the fleece’s power. While Rocky charges Ace and Red on a centaur! Prof snags a hoof with a vine, cowboy-style. Rocky hears a strange siren song and wanders to the beach. A mermaid sings - then flings fluid in Rocky’s face. It’s June in disguise! The golden fleece fades to normal. With the magic gone, Rocky’s head clears. The mythical creatures fade away to the land of legends.

Other Story

Story Title
"The contents of one of these vials..."
Script
Henry Boltinoff
Pencils
Henry Boltinoff
Story Line
Dr. Floogle has mixed up two vials of chemicals.
Data courtesy of the Grand Comics Database under Creative Commons license.
Published June-July 1960 by DC Tags: First Appearance

First Appearance of Multi-Man

The Man Who Conquered the Challengers
France Ed Herron
Bob Brown
Bob Brown
Multi-Man (intro, origin)
"The Man Who Conquered the Challengers"
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Published June-July 1960 by DC Tags: First Appearance

First Appearance of Multi-Man

Issue Details

Story Title
The Man Who Conquered the Challengers
Writer
France Ed Herron
Interior Art
Bob Brown
Cover Art
Bob Brown
Character Appearances
Multi-Man (intro, origin)
Storyline
"The Man Who Conquered the Challengers"

Other Story

Story Title
Captives of the Alien Beasts
Script
Ed France Herron?
Pencils
Bob Brown
Story Line

Other Story

Script
Henry Boltinoff
Pencils
Henry Boltinoff
Story Line

Other Story

Script
Henry Boltinoff
Pencils
Henry Boltinoff
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.
Published August-September 1960 by DC
The Return of Multi-Man!
Ed (France) Herron ?
Bob Brown
Bob Brown
Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan]; Duncan Pramble [Multi-Man]; Gurk; prison guards; Central American natives
"The Return of Multi-Man!" In prison, an explosion "kills" Multi-Man. He resurrects with super-strength and breaks out. He meets Gurk, a wizard-collector, who wants three parts of a Golden Turtle statue. The Challengers track MM, who almost kills them with a steam shovel. MM and Gurk steal two parts to the statue and fly to Central America. Natives guard a temple and the third piece, which Gurk steals while the Challs dump antidote on Pramble, who reverts to a normal man. Gurk has assembled the statue, which unlocks a secret door pointing to lost tribal treasure. Pramble was speared and reached a final, permanent form: a frail body and giant head with super-genius. Gurk and MM are captured, but the Challs fret that MM's new super-brain will cause "plenty of trouble in the future".
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Published August-September 1960 by DC

Issue Details

Story Title
The Return of Multi-Man!
Writer
Ed (France) Herron ?
Interior Art
Bob Brown
Cover Art
Bob Brown
Character Appearances
Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan]; Duncan Pramble [Multi-Man]; Gurk; prison guards; Central American natives
Storyline
"The Return of Multi-Man!" In prison, an explosion "kills" Multi-Man. He resurrects with super-strength and breaks out. He meets Gurk, a wizard-collector, who wants three parts of a Golden Turtle statue. The Challengers track MM, who almost kills them with a steam shovel. MM and Gurk steal two parts to the statue and fly to Central America. Natives guard a temple and the third piece, which Gurk steals while the Challs dump antidote on Pramble, who reverts to a normal man. Gurk has assembled the statue, which unlocks a secret door pointing to lost tribal treasure. Pramble was speared and reached a final, permanent form: a frail body and giant head with super-genius. Gurk and MM are captured, but the Challs fret that MM's new super-brain will cause "plenty of trouble in the future".

Other Story

Story Title
The Lady Giant and the Beast!
Script
Dave Wood ?
Pencils
Bob Brown
Story Line
Alone in Challenger Mountain, June experiments on space spores brought to Earth by a balloon. They explode and she blacks out. The Challs return to find June is giant-sized and hostile, trying to crush them, but she passes out. Another menace is a huge red dragon-beast menacing a local town. June revives, sensible again, and grapples the monster. The beast avoided crossing a stream, so the Challs commandeer a fire truck and hose it. The beast shrinks to nothingness. It was actually a microbe monster!
Data courtesy of the Grand Comics Database under Creative Commons license.
Published October-November 1960 by DC
The Incredible Metal Creature!
Ed France Herron?
Bob Brown
Bob Brown
Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; Thark (alien policeman); Albom (villain, human); Halanka (villain, alien)
"The Incredible Metal Creature!" Pursuing a criminal, the Challengers find he's partnered with a metallic fugitive from another world. Halanka, the metal alien, pulls their Jeep with magnetism and melts it with heat. Two Challengers rescue an interplanetary lawman, Thark, who comes to their aid. Using Thark's force-field gun, the Challengers get close enough to "bowl" Halanka over.
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Published October-November 1960 by DC

Issue Details

Story Title
The Incredible Metal Creature!
Writer
Ed France Herron?
Interior Art
Bob Brown
Cover Art
Bob Brown
Character Appearances
Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; Thark (alien policeman); Albom (villain, human); Halanka (villain, alien)
Storyline
"The Incredible Metal Creature!" Pursuing a criminal, the Challengers find he's partnered with a metallic fugitive from another world. Halanka, the metal alien, pulls their Jeep with magnetism and melts it with heat. Two Challengers rescue an interplanetary lawman, Thark, who comes to their aid. Using Thark's force-field gun, the Challengers get close enough to "bowl" Halanka over.

Other Story

Story Title
Prisoners of the Mirage World
Script
Ed France Herron?
Pencils
Bob Brown
Story Line
Having crashed in the desert, a dazed June Robbins staggers into a medieval world within a mirage. The Challengers follow to rescue her before the mirage disappears. Captured by knights, the Challengers issue a challenge - a duel with chariots. Despite Sir Rodfold's treachery, the Challengers win through, snatch June, and dive out of the city just before it vanishes forever.
Data courtesy of the Grand Comics Database under Creative Commons license.
Published December-January 1960-1961 by DC
The Genie Who Feared June
George Kashdan?
Bob Brown
Bob Brown
Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan]; June Robbins; Malvolio and his henchmen; Ahmed (a genie)
"The Genie Who Feared June" While shopping with Ace in town, June drools over opals. Next door, a giant genie bursts out of the bank. Oddly, he only stole sacks of pennies. Summoning the team, the Challengers track red clay to pits outside town. Malvolio, 'the magician turned to crime', stirs a cauldron. Adding copper, Malvolio blows a ram's horn. The genie, Ahmed, appears and blows the Challengers away with a gale. But when June raises a hand and utters 'magic words', the genie recoils and flees with Malvolio. The crooks need brass and iron to bring the genie to full power. The Challengers pursue to a brass factory. Ace tries June's trick, but the genie attacks. The heroes knock a scaffolding on him. When June arrives, the genie flees. Seeking iron ore, they scout an old iron mine. June baits Malvolio's henchmen, who get jumped by brawling Challengers. Ace advances with raised hand and a magic incantation, and this time forces the genie back. Grabbing and smashing the ram's horn, Ace ends the menace. The trick? June was wearing a ring of opal, once used to combat black magic. Now Ace wears one too!
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Published December-January 1960-1961 by DC

Issue Details

Story Title
The Genie Who Feared June
Writer
George Kashdan?
Interior Art
Bob Brown
Cover Art
Bob Brown
Character Appearances
Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan]; June Robbins; Malvolio and his henchmen; Ahmed (a genie)
Storyline
"The Genie Who Feared June" While shopping with Ace in town, June drools over opals. Next door, a giant genie bursts out of the bank. Oddly, he only stole sacks of pennies. Summoning the team, the Challengers track red clay to pits outside town. Malvolio, 'the magician turned to crime', stirs a cauldron. Adding copper, Malvolio blows a ram's horn. The genie, Ahmed, appears and blows the Challengers away with a gale. But when June raises a hand and utters 'magic words', the genie recoils and flees with Malvolio. The crooks need brass and iron to bring the genie to full power. The Challengers pursue to a brass factory. Ace tries June's trick, but the genie attacks. The heroes knock a scaffolding on him. When June arrives, the genie flees. Seeking iron ore, they scout an old iron mine. June baits Malvolio's henchmen, who get jumped by brawling Challengers. Ace advances with raised hand and a magic incantation, and this time forces the genie back. Grabbing and smashing the ram's horn, Ace ends the menace. The trick? June was wearing a ring of opal, once used to combat black magic. Now Ace wears one too!

Other Story

Story Title
Secret of the Space Capsules
Script
Dave Wood?
Pencils
Bob Brown
Story Line
In the North Atlantic, a Navy destroyer shells an iceberg and releases four golden capsules. One sprouts tentacles that snare the ship. Call the Challengers! Prof dives and spearguns the tentacles at the heart. They wither. But three more space capsules are missing. Tracking currents, the Challengers spot a drill-nosed monster chasing fisherman. They stop it with a wall of gasoline fire, but the monster drills out of sight. Nearby, fisherman confront two tiny gold aliens who shoot rayguns in self-defense. Ace intervenes. The aliens are growing larger and blacking out. Scientists, they came to Earth to run tests during the last Ice Age! The drill-monster was their tiny pet, Zod. Their ship was engulfed by an avalanche. They entered the space capsules and... awoke nowadays. They need “ollygen” to revive. It’s in the fourth capsule. Which is about to be sunk by a tidal wave. Red rappels down and fixes a line, almost swept under himself. The Challengers fit “ollygen” masks to the aliens, who board their spaceship and fly off! And now the drill-nose monster charges! It shears off a lighthouse which topples at our heroes - only to freeze in mid-air. Revived, the aliens ray-patch the lighthouse, retrieve their pet, and zoom away. “Farewell and thank you!”

Other Story

Story Title
"We should land on the moon shortly!"
Script
?
Pencils
Henry Boltinoff (signed)
Story Line
Doctor Rocket and his friend play golf on the moon.
Data courtesy of the Grand Comics Database under Creative Commons license.
Published February-March 1961 by DC
The Menace of Mystery Island!
Dave Wood ?
Bob Brown
Bob Brown
Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan]; June Robbins; Cosmo (intro); crooks
"The Menace of Mystery Island!" June has inherited a Caribbean island. As the Challengers fly there, an alien space capsule splashes down. The Challengers rescue an alien creature like an orange raccoon and name it Cosmo. On the island, the volcano is active. The Challengers split up. Prof and Red are almost killed by a rigged palm tree, find the volcano is man-made with oil and smoke, and are trapped by a steel cage. Ace, Rocky, and June run into a gale, except it's caused by a giant fan. Obviously, someone wants them off the island. They get snared in a steel net. Cosmo, the mystery pet, chews through the steel! Cosmo projects eye-beams that disintegrate foliage as they hunt Prof and Red. These two are captured by thugs, and threatened with guns, but Cosmo's paws project force-beams to disarm them. The Challengers brawl. The island was used as a weapons depot by gangs. Cosmo saved the day, so "he's a true Challenger now!"
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Published February-March 1961 by DC

Issue Details

Story Title
The Menace of Mystery Island!
Writer
Dave Wood ?
Interior Art
Bob Brown
Cover Art
Bob Brown
Character Appearances
Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan]; June Robbins; Cosmo (intro); crooks
Storyline
"The Menace of Mystery Island!" June has inherited a Caribbean island. As the Challengers fly there, an alien space capsule splashes down. The Challengers rescue an alien creature like an orange raccoon and name it Cosmo. On the island, the volcano is active. The Challengers split up. Prof and Red are almost killed by a rigged palm tree, find the volcano is man-made with oil and smoke, and are trapped by a steel cage. Ace, Rocky, and June run into a gale, except it's caused by a giant fan. Obviously, someone wants them off the island. They get snared in a steel net. Cosmo, the mystery pet, chews through the steel! Cosmo projects eye-beams that disintegrate foliage as they hunt Prof and Red. These two are captured by thugs, and threatened with guns, but Cosmo's paws project force-beams to disarm them. The Challengers brawl. The island was used as a weapons depot by gangs. Cosmo saved the day, so "he's a true Challenger now!"

Other Story

Story Title
The Doomed World of Tomorrow
Script
Arnold Drake ?
Pencils
Bob Brown
Story Line
An eerie light-globe sails into Challenger Mountain, and pops. The guys find themselves in a lab in the mountain - in the 23rd Century! Dr. Oren Gough fetched them accidentally with his time machine. An alarm sounds. The Cosmic Creatures are attacking! Dr. Gough hurls a photon bomb to blind the monsters, and all flee. The Cosmic Creatures came from space seeking selenium, and destroy anything to get it! Selenium is found in meteorites. Red remembers one nearby. They also discover their faces carved in the mountain: a monument from the 20th Century! Dr. Gough explains the entire population of Earth will be evacuated, then a volti-ray will be used to wipe out the CCs. The Challengers volunteer to the ruling council, but Lenroy, a bruising-big scientist, claims the privilege with his three friends. The council rules for eight volunteers, who'll wear protective suits against the volti-ray. But that night, in a restaurant, the Challengers are almost killed by a planted bomb! They rush to see Lenroy, and are stopped cold by superstrong robots! Lenroy plans to save the world and become ruler of the council, then the world. Cosmic Creatures attack. The three robots get trashed. The Challengers fire the volti-rays, incinerating the monsters - except the heroes will die from stray radiation. Nope. Lenroy lied about that, too. He secretly improved the ray to be safe. Dr. Gough sends the Challengers back through time. They agree to not tell anyone about this job, "or they'll think we're off our rockers!"

Other Story

Story Title
"C'mon, Robbie, I see two seats!"
Script
Irwin Hasen
Pencils
Irwin Hasen
Story Line

Other Story

Story Title
"Professor Eureka, I think I saw a creature from another planet through my window."
Script
Henry Boltinoff (signed)
Pencils
Henry Boltinoff (signed)
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.
Published April-May 1961 by DC
The Alien Who Stole a Planet
Arnold Drake?
Bob Brown
Bob Brown
"The Alien Who Stole a Planet"
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Published April-May 1961 by DC

Issue Details

Story Title
The Alien Who Stole a Planet
Writer
Arnold Drake?
Interior Art
Bob Brown
Cover Art
Bob Brown
Storyline
"The Alien Who Stole a Planet"

Other Story

Story Title
Beasts From the Fabulous Gem
Script
Arnold Drake?
Pencils
Bob Brown
Story Line

Other Story

Story Title
"Let's go! This is a television camera."
Script
Henry Boltinoff (signed)
Pencils
Henry Boltinoff (signed)
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.
Published June-July 1961 by DC
Multi-man Strikes Again
Arnold Drake?
Bob Brown
Bob Brown
Multi Man
"Multi-man Strikes Again"
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Published June-July 1961 by DC

Issue Details

Story Title
Multi-man Strikes Again
Writer
Arnold Drake?
Interior Art
Bob Brown
Cover Art
Bob Brown
Character Appearances
Multi Man
Storyline
"Multi-man Strikes Again"

Other Story

Story Title
The Cosmic-Powered Creatures
Script
Dave Wood?
Pencils
Bob Brown
Story Line

Other Story

Story Title
"Look what I picked up at an auction sale"
Script
Henry Boltinoff (signed)
Pencils
Henry Boltinoff (signed)
Story Line
Data courtesy of the Grand Comics Database under Creative Commons license.

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