Credits

• Pencils: Paris Cullins
• Inks: Bob Smith
• Letters: Gaspar Saladino

Storyline

Superboy accidentally arrives in a parallel world where the Legion are villains.

Credits

• Script: Jerry Siegel
• Pencils: Curt Swan
• Inks: George Klein
• Colors: Shelley Eiber
• Letters: Milt Snapinn

Storyline

Space pirate Vorm joins the Legion as Dynamo Boy and begins to eliminate the Legionnaires.

Credits

• Script: Jerry Siegel
• Pencils: Jim Mooney
• Inks: Jim Mooney
• Colors: Shelley Eiber
• Letters: David Huffine

Storyline

Dynamo Boy expels the remaining Legionnaires and makes plans for a new member drive.

Credits

• Script: Jerry Siegel
• Pencils: Jim Mooney
• Inks: Jim Mooney
• Colors: Shelley Eiber
• Letters: David Huffine

Storyline

Dynamo Boy accepts as members the Legion of Super-Villains, over the Subs' objections.

Credits

• Script: Jerry Siegel
• Pencils: Jim Mooney
• Inks: Jim Mooney
• Colors: George Roberts
• Letters: David Huffine

Storyline

The LSV turns on Dynamo Boy and sends him into the future. The ex-Legionnaires, keeping track of events from far off, challenge the LSV to a final confrontation.

Credits

• Script: Jerry Siegel
• Pencils: Jim Mooney
• Inks: Jim Mooney
• Colors: George Roberts
• Letters: David Huffine

Storyline

Lightning Lad loses an arm to the Super-Moby Dick of Space. When Ultra Boy fails to subdue the space creature, Lightning Lad leads a team against it.

Credits

• Script: Edmond Hamilton
• Pencils: John Forte
• Inks: George Klein
• Colors: Helen Vesik
• Letters: Milt Snapinn

Storyline

Lightning Lad shrinks the space creature to its original size with the help of the scientist who accidentally enlarged it.

Credits

• Script: Edmond Hamilton
• Pencils: John Forte
• Inks: George Klein
• Colors: Helen Vesik
• Letters: Milt Snapinn

Storyline

The Legionnaires travel to the past to find out the story behind an ancient artifact which refers to a war between Earth and Krypton. The half that goes to Earth's past finds space travellers colonizing ancient Atlantis; the other half accompanies a group of Kryptonians who leave anti-scientific Krypton for Earth.

Credits

• Script: Edmond Hamilton
• Pencils: John Forte
• Inks: George Klein
• Colors: Karin Orlando
• Letters: Milt Snapinn

Storyline

While the Atlanteans and Kryptonians fight, Brainiac 5 discovers why Earth's air irritates the Atlanteans and helps them adapt to life under the sea. Later, back in the future, Superboy finds more artifacts that explain what happened to the Kryptonians.

Credits

• Script: Edmond Hamilton
• Pencils: John Forte
• Inks: George Klein
• Colors: Karin Orlando
• Letters: Milt Snapinn

Storyline

Superboy recalls a case when the Legionnaires were helped by a hero called Unknown Boy.

Credits

• Script: Edmond Hamilton
• Pencils: John Forte
• Inks: Sheldon Moldoff
• Colors: Jeanine Casey
• Letters: Vivian Berg

Storyline

After Unknown Boy helps the Legion finish a case, Superboy figures out that under the costume is Supergirl. Supergirl then recalls going through a red kryptonite cloud and losing her memory, but knowing she had to protect her secret identity, and so creating the Unknown Boy costume.

Credits

• Script: Edmond Hamilton
• Pencils: John Forte
• Inks: Sheldon Moldoff
• Colors: Jeanine Casey
• Letters: Milt Snapinn

Credits

• Script: Nicola Cuti
• Script: E. Nelson Bridwell
• Pencils: James Sherman
• Pencils: Keith Giffen
• Pencils: Jim Janes
• Inks: Jack Abel
• Inks: Frank Chiaramonte
• Inks: Larry Mahlstedt

Credits

• Script: Paul Levitz