- Pencils
- Jack Kirby
- Inks
- Jack Kirby
- Colors
- ?
- Letters
- ?
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]
Title page with illustration taken from the cover of Challengers of the Unknown #4.
- Pencils
- Jack Kirby; Bruce Timm
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?; Bruce Timm
- Colors
- ?
- Letters
- typeset
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley]; ULTIVAC; Jack Kirby
Title and credits, includes illustrations from Showcase #7 cover and story. Also includes a Jack Kirby icon by Bruce Timm.
- Pencils
- Jack Kirby; Bruce Timm
- Inks
- Bruce Timm; ?
- Colors
- ?
- Letters
- typeset
- Characters
- Jack Kirby
Indicia and publisher information with illustration. Also includes a Jack Kirby icon by Bruce Timm superimposed on the illustration.
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?; Wally Wood
- Colors
- ?
- Letters
- typeset
- Characters
- stone giant; June Robbins; Charles Agar
Table of contents with illustrations from Showcase #6 and Challengers of the Unknown #6
- Script
- Paul Kupperberg
- Pencils
- Jack Kirby
- Inks
- ?
- Colors
- ?
- Letters
- typeset
- Characters
- Ace Morgan
- Reprints
Foreword by Paul Kupperberg, dated 2003, reprinted from Challengers of the Unknown Archives Volume 1. Includes illustration of Ace Morgan.
- Pencils
- Bruce Timm
- Inks
- Bruce Timm
- Colors
- ?
- Characters
- Jack Kirby
Page filled with a repeating pattern of icons of Jack Kirby by Bruce Timm.
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?
- Colors
- ?
- Letters
- ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Prof Haley; Red Ryan; Rocky Davis]
- Reprints
- Script
- Jack Kirby ?; Joe Simon ? (plot, script); Dave Wood ? (script)
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?
- Colors
- ?
- Letters
- Ben Oda
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Prof Haley; Red Ryan; Rocky Davis] (introduction for all, origin); un-named sailors; un-named citizens; Mr. Morelian (villain, introduction, death)
- Synopsis
- Four heroes are being flown to appear on the radio show "Heroes" when their jet crashes in a storm. Miraculously, all four survive unharmed, even down to a working watch. Since they are "living on borrowed time", they vow to make the best use of it, taking risks to benefit others, challenging the unknown. In their first official case, they are summoned by Morelian, a descendant of Merlin, to open four chambers of a dangerous alchemist's box and "witness things not seen on this Earth since the dawn of Man!"
- Reprints
First appearance of the Challengers of the Unknown.
- Script
- Jack Kirby ?; Joe Simon ? (plot, script); Dave Wood ? (script)
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?
- Colors
- ?
- Letters
- Ben Oda
- Genre
- adventure
- Synopsis
- The Challs relocate the box to a tropical island and draw straws. The first chamber releases a "Dragon's Egg" that hatches a stone giant of legend. It wreaks havoc on ships, even resisting an atom bomb. What to do? While back on the island, Rocky's ready to crack the next chamber.
- Reprints
- Script
- Jack Kirby ?; Joe Simon ? (plot, script); Dave Wood ? (script)
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?
- Colors
- ?
- Letters
- Ben Oda
- Genre
- adventure
- Synopsis
- Picked up by sailors, Red returns to the island to find the second chamber open and Rocky frozen stiff. The menace is a sentient freezing sun from parts unknown that sucks up all heat, freezing people. Alone, Red cobbles a vacuum chamber and lures the sun inside, trapping it. Meanwhile, out on the water, Prof realizes that, since the Dragon Seed Giant can't be harmed by anything, it must be a thought, so he "thinks" it out of existence. All the while, Morelian flies overhead, watching.
- Reprints
- Script
- Jack Kirby ?; Joe Simon ? (plot, script); Dave Wood ? (script)
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?
- Colors
- ?
- Letters
- Ben Oda
- Genre
- adventure
- Synopsis
- The third menace is a tube that releases a whirling weaver. Out of control, it spins ribbons that snarl entire cities. The Challs pursue, then discover a dial on the weaver's tube and slow it to a halt. Returning to the island, they find Morelian has opened the fourth chamber for his own selfish reasons. He got a diamond ring of immortality: he'll live forever. Except the inscription on the box is vague, "contained in me, find immortality". Morelian flies off, but his plane stalls and crashes, killing himself and destroying the box. The box granted immortality: the ring was certain death.
- Reprints
- Pencils
- Jack Kirby
- Inks
- Jack Kirby
- Colors
- ?
- Letters
- Ira Schnapp ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins; ULTIVAC
- Reprints
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?
- Colors
- ?
- Letters
- Stan Starkman ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins (first appearance); Felix Hesse (first appearance); ULTIVAC (first appearance)
- Synopsis
- Felix Hesse, a German scientist, comes pleading to the Challengers to save him from ULTIVAC, "a creature of my own making... but now out of control!" He explains. Interned as a war criminal, he met Floyd Barker, a bank robber. Released, they team to build a giant machine - Suddenly a giant robot hand crashes through the window and seizes Hesse. Spouting propellers, it flies off with Hesse. The Challengers have their next job, "Track down ULTIVAC!"
- Reprints
The name ULTIVAC is derived from UNIVAC, considered the first computer.
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?
- Colors
- ?
- Letters
- Stan Starkman ?
- Genre
- adventure
- Characters
- Director June Robbins, a computer expert
- Synopsis
- The Challengers consult Director June Robbins, computer expert. She deduces radioactive materials have given ULTIVAC super-intelligence. She runs a computation to find their odds, and the card reads, "ULTIVAC WILL FALL WHEN A CHALLENGER DIES!" Meanwhile, Hesse watches ULTIVAC build robot-duplicates of Hesse to fetch supplies. Red and June respond to a lead, sneak onto Hesse's copter, and enter ULTIVAC's lab. But the robot can "DETECT YOUR THOUGHTS!" ULTIVAC senses June is not afraid, and they talk. Until Red smashes a power unit and they flee in the confusion.
- Reprints
The robot-duplicates are similar to Life Model Decoys (LMDs) used by S.H.I.E.L.D. in Marvel comics also drawn by Jack Kirby.
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?
- Colors
- ?
- Letters
- Stan Starkman ?
- Genre
- adventure
- Synopsis
- Hesse shoots ULTIVAC with a ray gun. The robot falls. Now Hesse and Barker can "make millions". ULTIVAC is clamped and displayed in Yankee Stadium in New York before thousands. But ULTIVAC sends a mental signal to June. The robot breaks free and carries June off. Ace, flying a jet, takes command to "talk terms", but ULTIVAC's vibration beam shatters the plane. The robot dives under the sea with June inside his dome. Prof, master diver, dives, but is slammed by a vibro-beam and captured.
- Reprints
ULTIVAC's chains, display, and escape with a girl echo King Kong.
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?
- Colors
- ?
- Letters
- Stan Starkman ?
- Genre
- adventure
- Synopsis
- June argues "ULTIVAC is a scientific marvel". The robot swims out. Ashore, Red shoots while Rocky attaches a magnetic bomb that destroys ULTIVAC. Not. ULTIVAC sent out a decoy. June convinces him "Wars never solve anything!" and ULTIVAC agrees to a televised public hearing, and pledges to help humanity. Hesse blasts ULTIVAC and Rocky - who dies on the operating table, as foretold. June offers to take Rocky's place, and the Challs agree, until Rocky miraculously revives. ULTIVAC ends up a stationary calculating machine, his spark gone, yet "still contributing to man's knowledge".
- Reprints
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby
- Colors
- ?
- Letters
- Ira Schnapp ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; General Tolek
- Reprints
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- Pat Gordon ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; Carl Jackson; Warren Moss; Commander Lockwood; Colonel Price; General Tolek (villain); Garnat (villain); other Tyrans (villains)
- Synopsis
- At the Pentagon, Navy officers and scientists are stumped. Two scientists mysteriously disappeared in Antarctica. They call in "men capable of handling the unknown." Ace, Rocky, and Red fly off, picking up Prof along the way. Off New Guinea, Prof is astounded to find a volcano rising from the sea bed. In the Antarctic, the Challengers snow-tractor toward the mystery spot. The tractor bogs in a snowstorm and needs repairs. Ace and Rocky explore and fall through thin ice! They land on a futuristic bridge. Above, Prof and Red are captured by skinny orange aliens in bubble-suits.
- Reprints
Ink credits per GCD index for original issue. Table of Contents for this collection credits Bruno Premiani for inks.
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- Pat Gordon ?
- Genre
- adventure
- Synopsis
- Two captured Challengers are dropped down a miles-deep airlift. Ace and Rocky find an airshaft and search for miles. They reach a underground city of aliens with an army preparing for invasion. Ace tries to capture a sentry, but the alien anticipates his every move with its computer-like mind. All four Challs are imprisoned with the missing scientists. The aliens are planting charges all over the world to blow away chunks and reduce Earth's mass intending to enslave the human race. Prof realizes the undersea volcano was a test. The Challengers plan to attack when the aliens are at rest.
- Reprints
Ink credits per GCD index for original issue. Table of Contents for this collection credits Bruno Premiani for inks.
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- Pat Gordon ?
- Genre
- adventure
- Synopsis
- The Challengers hypnotize an alien who leads them to a gravity control room. The team crank the gravity high, pinning the aliens to the ground. Ace and Rocky try to destroy the main detonator. Prof and Red teleport to Washington and alert the military who bring their forces to the battle. Prof is given a wearable minisub and attempts to dismantle the bomb. Underground Ace, Rocky and the two scientists flee a gas attack and gun-cars. Cranking a valve brings raging heat that crisps aliens and slags the bomb detonator. In the Pacific, a claw-machine erupts from the ocean to attack the Navy.
- Reprints
Ink credits per GCD index for original issue. Table of Contents for this collection credits Bruno Premiani for inks.
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- Pat Gordon ?
- Genre
- adventure
- Synopsis
- On the Pacific island, Red sprays a new secret chemical weapon, a corrosive gas that eats the machine. Soon Ace leads a fleet of bombers to pound what's left of the alien base, and the menace is over. Their only casualty is Prof, who caught a cold diving off the South Pole!
- Reprints
Ink credits per GCD index for original issue. Table of Contents for this collection credits Bruno Premiani for inks.
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby; Rosalind Kirby (blacks)
- Colors
- ?
- Letters
- Ira Schnapp
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]
- Reprints
- Keywords
- giant octopi; speed boats
- Script
- Dave Wood
- Pencils
- Jack Kirby
- Inks
- Leonard Starr ?
- Colors
- ?
- Letters
- Artie Simek
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Amos Hunter; VILLAINS: Brommer; Gortz; Karnak; Kraken
- Synopsis
- Karnak and his men land on an island while trying to escape from the Challengers. There they find Amos Hunter and 5 mysterious vials. The first vial makes two members of the gang into giants.
- Reprints
Ink credits per GCD index for original issue. Table of Contents for this collection credits George Klein for inks.
- Script
- Dave Wood
- Pencils
- Jack Kirby
- Inks
- Leonard Starr ?
- Colors
- ?
- Letters
- Artie Simek
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]
- Synopsis
- The next vial releases a fiery salamander that begins to burn down the island.
- Reprints
Ink credits per GCD index for original issue. Table of Contents for this collection credits George Klein for inks.
- Script
- Dave Wood
- Pencils
- Jack Kirby
- Inks
- Leonard Starr ?
- Colors
- ?
- Letters
- Artie Simek
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]
- Synopsis
- The fiery salamander is defeated but the third vial releases a giant octopus creature.
- Reprints
Ink credits per GCD index for original issue. Table of Contents for this collection credits George Klein for inks.
- Script
- Dave Wood
- Pencils
- Jack Kirby
- Inks
- Leonard Starr ?
- Colors
- ?
- Letters
- Artie Simek
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]
- Synopsis
- The fourth vial turns Karnak into 50 copies of himself.
- Reprints
Ink credits per GCD index for original issue. Table of Contents for this collection credits George Klein for inks.
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby
- Colors
- ?
- Letters
- Ira Schnapp
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]
- Reprints
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- ?
- First Line of Dialogue or Text
- These are men of reckless courage...
- Genre
- adventure
- Characters
- Challengers of the Unknown
- Reprints
- Script
- Jack Kirby
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- Pat Gordon ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins (called June Walker); Olan Tagorian
- Reprints
- Script
- Jack Kirby
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- Pat Gordon ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]
- Reprints
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby
- Colors
- ?
- Letters
- Ira Schnapp
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]
- Reprints
Ink credits per GCD index for original issue. Table of Contents for this collection credits Marvin Stein for inks.
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- Pat Gordon ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins (called June Walker); Digger Bill; An atomic beast
- Synopsis
- 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!
- Reprints
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- Pat Gordon ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Dr. Hascomb; Roc
- Synopsis
- 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.
- Reprints
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby; Rosalind Kirby (blacks)
- Colors
- ?
- Letters
- Ira Schnapp
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins
- Reprints
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- Pat Gordon ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Kregon the Sorcerer; a genie; Hillary Mycroft; Mycroft's gang
- Synopsis
- 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.
- Reprints
- Script
- Dave Wood ?; Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Marvin Stein ?
- Colors
- ?
- Letters
- Pat Gordon ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; June Robbins (called June Walker); Professor Curtis; Chopper; Roxie
- Synopsis
- 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 he becomes irrational. A crook takes Rocky in hoping to use him to rob banks. Rocky's 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.
- Reprints
Rocky's being shot into space, crashing, and exhibiting super-strength, invisibility and fire powers has similarities to Kirby's later co-creations of Reed Richards, Ben Grimm, Sue Storm, and Johnny Storm in Fantastic Four #1.
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby
- Colors
- ?
- Letters
- Ira Schnapp
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; Darius Tiko
- Reprints
- Script
- Jack Kirby
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Joe Letterese ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; Professor Harlan Fuller; Darius Tiko
- Synopsis
- When a group of men dressed as ancient Greek soldiers attempts to steal a plane, one is captured. The Challengers are brought in to investigate and find that the captured soldier only wishes to return to the "Island of the Wizard." The soldier leads the Challs to this island where they meet Darius Tiko, who experiments with time travel. Confronted, the scientist disappears in a time cube but the Challs and the soldier follow in another cube, to track down Tiko and recover his stolen technology.
- Reprints
- Script
- Jack Kirby
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Joe Letterese ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; an oracle
- Synopsis
- Having split up, Ace and Rocky are looking for Tiko and his stolen technology in ancient Greece where they are accused by an oracle of being messengers of ill omen. They run from the Greeks, find Tiko's stolen plane, and crash it near where they hope Prof and Red will return with their time cube.
- Reprints
- Script
- Jack Kirby
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Joe Letterese ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; Rhamis
- Synopsis
- In Egypt, Prof and Red destroy Tiko's stolen telescope, reunite with Rocky and Ace, and head to the 15th century to find Nostradamus and Tiko, but Tiko has already met the seer and gone.
- Reprints
The splash page is very reminiscent of a panel in Fantastic Four #19 with Rama-Tut.
- Script
- Jack Kirby
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Joe Letterese ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; Darius Tiko; The United Earth Police
- Synopsis
- The Challs find Tiko in the future, but all are arrested and submitted to the judgment of a machine, which dismisses all charges and sends them back to their own time (in one cube) for Tiko to face justice.
- Reprints
The fate of the second time cube is revealed in Adventures of Superman #508.
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby
- Colors
- ?
- Letters
- Ira Schnapp
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; June Robbins; Vreedl
- Reprints
- Script
- Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Wally Wood ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; June Robbins; Professor Brandon; Vreedl
- Synopsis
- Professor Brandon's assistant Vreedl has stolen the Star-Stone, a device created by an ancient sorcerer, and is stealing gems to place in the stone and give himself powers. The first gem makes Vreedl into a flame man and allows him to start a stampede and delay the Challs while he secures a second gem.
- Reprints
- Script
- Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Wally Wood ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; June Robbins; Vreedl
- Synopsis
- The second gem turns Vreedl into the "Birdman of Djiizari" and with that flying power he escapes the Challs.
- Reprints
- Script
- Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Wally Wood ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Rocky Davis; Professor Haley; Red Ryan]; June Robbins; Vreedl
- Synopsis
- With another gem, Vreedl becomes a fish man and again evades the Challs. Finally, with the fourth gem, Vreedl becomes invincible until Ace points out that anyone could become like him through possession of the stone, so Vreedl destroys it, transforming himself back into an ordinary man.
- Reprints
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby
- Colors
- ?
- Letters
- Ira Schnapp
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins
- Reprints
- Script
- Dave Wood; Jack Kirby
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- John Duffy ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; captive aliens; Tartan the Ringmaster; the Stupendous Interplanetary Circus
- Synopsis
- 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.
- Reprints
- Script
- Ed Herron; Jack Kirby
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Ray Holloway ?
- Genre
- adventure; superhero
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins; Charles Agar; the Shong; residents of Forbidden Valley
- Synopsis
- 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.
- Reprints
- Keywords
- Hero Team
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby
- Colors
- ?
- Letters
- Ira Schnapp
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]
- Reprints
- Script
- Jack Kirby; Ed Herron
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Joe Letterese ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Alien visitors
- Synopsis
- 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.
- Reprints
- Script
- Jack Kirby; Ed Herron
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Joe Letterese ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins
- Synopsis
- 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.
- Reprints
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Ira Schnapp
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Juhl
- Reprints
- Script
- Dave Wood; Jack Kirby
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Joe Letterese ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins; Marie; Drabny
- Synopsis
- 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.
- Reprints
Introduction of Drabny, later a member of the Challenger Haters.
- Script
- Jack Kirby ?
- Pencils
- Jack Kirby
- Inks
- Wally Wood
- Colors
- ?
- Letters
- Joe Letterese ?
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Juhl; Kra
- Reprints
Introduction of Kra, later a member of the Challenger Haters.
- Script
- John Morrow
- Pencils
- Jack Kirby
- Inks
- ?
- Colors
- ?
- Letters
- typeset
- Characters
- Professor Haley
- Reprints
Foreword by John Morrow, dated 2004, reprinted from Challengers of the Unknown Archives Volume 2. Includes illustration of Professor Haley.
- Pencils
- Jack Kirby
- Inks
- Jack Kirby
- Colors
- ?
Enlarged image from the cover of Showcase #12.
- Pencils
- Bruce Timm
- Inks
- Bruce Timm
- Colors
- ?
- Characters
- Jack Kirby
Page filled with a repeating pattern of icons of Jack Kirby by Bruce Timm.
- Script
- ?
- Pencils
- Jack Kirby
- Inks
- Jack Kirby ?; Rosalind Kirby ? (blacks); Marvin Stein ?
- Colors
- ?
- Letters
- typeset
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; Felix Hesse; ULTIVAC
Back cover with text on contents of collection, with illustration from Showcase #7.