Characters

• Challengers of the Unknown [Red Ryan
• Rocky Davis
• Prof Haley
• Ace Morgan]
• Superboy
• Ultra Boy

Credits

• Pencils: Gil Kane
• Inks: Gil Kane
• Colors: Anthony Tollin
• Letters: Gaspar Saladino

Storyline

The not-yet-Challengers investigate who sabotaged their plane. Red Ryan escorts an old friend, Johnny Green, in Las Vegas, when a car tries to run them down! Johnny explains HE was the target, not the heroes. Johnny won $300,000 from mobsters but hadn't collected. He was to fly to Vegas with Red. Mobsters planted a plastic sabotage device to crash the plane: plastic to fool metal detectors. The heroes meet the mobsters. A fight brings "Chaos in the Casino". Johnny gets paid and the mob goes to jail. And the heroes finally get their TV appearance as "Challengers of the Unknown!"

Characters

• Challengers of the Unknown [Ace Morgan
• Rocky Davis
• Prof Haley
• Red Ryan]

Credits

• Script: Bob Rozakis
• Pencils: Alex Toth
• Inks: Dan Adkins
• Colors: Anthony Tollin
• Letters: John Costanza
• Editing: Nicola Cuti

Storyline

Ultra Boy must discover Superboy's secret identity as an initiation test for the Legion.

Characters

• Superboy [also as Clark Kent]
• Ultra Boy [Jo Nah, also as "Gary Crane"] (introduction and origin)
• Marla [also as "Ben Crane"]
• Pete Ross
• Krypto
• Lana Lang
• Martha Kent
• Jonathan Kent

Credits

• Script: Jerry Siegel
• Pencils: Curt Swan
• Inks: George Klein
• Colors: Gene D'Angelo
• Letters: Milt Snapinn
• Editing: Mort Weisinger

Storyline

Mera has been held captive by the same gangsters Aquaman has been fighting. After they escape, they head for Atlantis for the final showdown with Narkran.

Characters

• Aquaman
• Mera
• Vulko
• Narkran
• Aquagirl
• Aqualad (cameo flashback)
• Aquababy (cameo flashback)

Credits

• Script: Steve Skeates
• Pencils: Jim Aparo
• Inks: Frank Giacoia
• Colors: Bob LeRose
• Letters: Jim Aparo
• Editing: Dick Giordano

Storyline

The Marvel Family unite to battle the evil Black Adam.

Characters

• Captain Marvel [also appears as Billy Batson]
• Captain Marvel, Jr. [also appears as Freddy Freeman]
• Mary Marvel [also appears as Mary Batson]
• Uncle Marvel
• Black Adam [Teth-Adam]
• Shazam

Credits

• Script: Otto Binder
• Pencils: C. C. Beck
• Inks: C. C. Beck
• Colors: Nansi Hoolahan

Storyline

At a regular meeting of the Legion of Super-Heroes, the Legionnaires lose control of their powers. Urthlo arrives and announces that he now controls the Legionnaires' powers and there is nothing they can do about it. But Saturn Girl comes up with a serum to temporarily cure Mon-El and immunize him against lead, and Superboy releases him from the Phantom Zone to knock out Urthlo, who turns out to be an automaton created by Lex Luthor sent into the future to destroy the Legion.

Characters

• Superboy [also appears as Clark Kent]
• Legion of Super-Heroes [Cosmic Boy
• Saturn Girl
• Lightning Lad
• Sun Boy
• Chameleon Boy (statue)
• Bouncing Boy (statue)
• Shrinking Violet (statue)
• Invisible Kid [Lyle Norg] (statue)]
• Lex Luthor
• Urthlo
• Mon-El

Credits

• Script: Jerry Siegel
• Pencils: John Forte
• Pencils: Al Plastino
• Inks: John Forte
• Inks: Al Plastino
• Colors: Gene D'Angelo
• Letters: Milt Snapinn
• Editing: Mort Weisinger

Storyline

An evil force invades the body of young Hamilton Benedict, giving him supernatural powers to battle the Spectre.

Characters

• Spectre
• Jim Corrigan
• Hamilton Benedict

Credits

• Script: Neal Adams
• Pencils: Neal Adams
• Inks: Neal Adams
• Colors: Jerry Serpe
• Letters: Gaspar Saladino
• Editing: Julius Schwartz

Storyline

Discussion of the Legion stories reprinted in the issue.

Credits

• Script: Paul Levitz

Characters

• Legion of Super-Heroes [Lightning Lad
• Brainiac 5
• Cosmic Boy
• Saturn Girl
• Sun Boy]
• Urthlo
• Aquaman
• Mera
• Captain Marvel
• Mary Marvel
• Captain Marvel, Jr.
• Black Adam
• Spectre

Credits

• Script: Nicola Cuti (uncertain)
• Pencils: Howard Bender
• Inks: Frank Giacoia
• Letters: Gaspar Saladino