- Pencils
- Curt Swan (illustration)
- Inks
- George Klein (illustration)
- Colors
- ?
- Letters
- typeset
- Characters
- Superboy
Title page illustrated with a detail from a story from Superboy (DC, 1949 series) #117 (December 1964), flipped and slightly altered.
- Pencils
- John Forte (illustration)
- Inks
- John Forte (illustration)
- Colors
- ?
- Letters
- typeset
- Characters
- Triplicate Girl
Illustrated with a detail from a story from an unidentified issue of Adventure Comics (DC, 1938 series).
- Script
- Harry Broertjes
- Pencils
- John Forte (illustration)
- Inks
- John Forte (illustration)
- Colors
- ?
- Letters
- typeset
- Characters
- Matter-Eater Lad
Illustrated with a detail from a story from Adventure Comics (DC, 1938 series) #318 (March 1964).
- Script
- ?
- Letters
- typeset
- Reprints
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Ira Schnapp
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Sun Boy; Matter-Eater Lad; Triplicate Girl; Cosmic Boy; Light Lass; Star Boy; Lightning Lad]; Superboy (in inset)
- Reprints
- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Sun Boy; Cosmic Boy; Light Lass; Superboy (cameo); Mon-El (cameo); Lightning Lad; Star Boy; Matter-Eater Lad; Triplicate Girl]; Time Trapper (cameo)
- Synopsis
- During a rescue mission, stress gets to Sun Boy, who sets the rest of the Legionnaires adrift in a lifeboat.
- Reprints
- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Sun Boy; Light Lass; Cosmic Boy; Triplicate Girl; Matter-Eater Lad; Lightning Lad; Star Boy]
- Synopsis
- The castaway Legionnaires find their way back to the rescue ship, now piloted by a catatonic Sun Boy.
- Reprints
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- ?
- Genre
- superhero
- Characters
- Jimmy Olsen [as Elastic Lad]; Superman; Legion of Super-Heroes [Saturn Girl; Light Lass; Triplicate Girl]
- Reprints
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Rick Taylor; Tom McCraw
- Letters
- ?
- Genre
- superhero
- Characters
- Jimmy Olsen [also as Elastic Lad]; Legion of Super-Heroes [Light Lass; Saturn Girl; Triplicate Girl; Sun Boy; Ultra Boy]; Lucy Lane
- Synopsis
- The Legion girls bring Jimmy to the future to stage emergencies and make Lucy appreciate him.
- Reprints
- Pencils
- Curt Swan
- Inks
- Sheldon Moldoff
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Ira Schnapp
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Superboy; Brainiac 5; Bouncing Boy; Chameleon Boy; Saturn Girl; Ultra Boy; Cosmic Boy; Triplicate Girl; Star Boy]
- Reprints
- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn (page 1); ? (pages 2-9)
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Colossal Boy; Element Lad; Sun Boy; Shrinking Violet; Phantom Girl; Mon-El; Superboy; Bouncing Boy; Saturn Girl; Chameleon Boy; Brainiac 5; Star Boy; Triplicate Girl; Invisible Kid; Lightning Lad; Cosmic Boy]
- Synopsis
- Isolationist planet Throon builds a citadel to keep others away and uses a ray to disable all passing spaceships. The first Legion team selected to take out the ray meets their defeat.
- Reprints
- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Substitute-Heroes [Fire Lad; Chlorophyll Kid; Polar Boy; Stone Boy; Night Girl]; Legion of Super-Heroes [Sun Boy; Star Boy; Triplicate Girl; Ultra Boy; Matter-Eater Lad; Cosmic Boy; Invisible Kid; Superboy; Brainiac 5; Bouncing Boy; Chameleon Boy; Saturn Girl; Element Lad; Phantom Girl; Colossal Boy; Light Lass; Mon-El; Lightning Lad]
- Synopsis
- The next two teams of Legionnaires also fail, but the Subs are able to put an end to the menace of Throon.
- Reprints
- Script
- Jerry Siegel; Otto Binder (pages 4-9, uncredited)
- Pencils
- John Forte (pages 1-3, 10); George Papp (pages 4-9)
- Inks
- Sheldon Moldoff (pages 1-3, 10); George Papp (pages 4-9); Al Plastino (Superboy and Clark Kent faces)
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Superboy [also as Clark Kent]; Chameleon Boy; Mon-El; Element Lad; Saturn Girl; Lightning Lad; Sun Boy; Brainiac 5]; Dev-Em; Radiation Roy; Proty II; Krypto; Molock
- Synopsis
- Dev-Em arrives at Legion headquarters as a member of the Inter-Stellar Counter-Intelligence Corps on a mission to nab the elusive leader of the Cosmic Spy Legion, Morlock the Merciless, but loses the assignment to Superboy.
- Reprints
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- Sheldon Moldoff
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Superboy; Brainiac 5; Sun Boy, Chameleon Boy; Element Lad; Lightning Lad; Mon-El]; Dev-Em; Molock; Proty II
- Synopsis
- Superboy successfully completes Dev-Em's mission, with Proty II's help.
- Reprints
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Ira Schnapp
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Superboy; Lightning Lad; Saturn Girl; Star Boy; Mon-El]
- Reprints
- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- John Forte; Al Plastino (Superboy face on page 1 only)
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Sun Boy; Mon-El; Superboy; Shrinking Violet; Star Boy; Phantom Girl; Saturn Girl; Bouncing Boy; Element Lad; Ultra Boy; Chameleon Boy; Triplicate Girl; Brainiac 5; Matter-Eater Lad]; Time Trapper [also as Commissioner Wilson]
- Synopsis
- The Legionnaires submit to tests of their ability to keep secret their greatest weapon from Commissioner Wilson.
- Reprints
Bouncing Boy loses his power and joins the Legion Reserves.
- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Saturn Girl; Colossal Boy; Matter-Eater Lad; Star Boy; Shrinking Violet; Superboy; Invisible Kid; Element Lad; Sun Boy; Ultra Boy; Mon-El; Phantom Girl; Chameleon Boy; Lightning Lad; Brainiac 5]; Time Trapper [also as Commissioner Wilson]; Bouncing Boy
- Synopsis
- Lightning Lad purposely fails his test to expose Commissioner Wilson as the Time Trapper.
- Reprints
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Ira Schnapp
- Genre
- superhero
- Characters
- Legion of Super-Pets [Super-Horse [Comet]; Streaky; Krypto; Super-Monkey [Beppo]; Proty II [partly as Superboy]]
- Reprints
- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- Sheldon Moldoff
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Pets [Super-Horse [Comet]; Krypto; Streaky; Super-Monkey [Beppo]; Proty II]; Legion of Super-Heroes [Superboy; Phantom Girl; Sun Boy; Lightning Lad; Brainiac 5; Light Lass; Saturn Girl; Mon-El; Chameleon Boy]; Legion of Substitute-Heroes [Fire Lad; Chlorophyll Kid; Polar Boy; Night Girl]; Supergirl
- Synopsis
- With the Legion away trying to capture the Time Trapper, the Super-Pets are left in charge. They assign Proty II tests to prove he can join their ranks.
- Reprints
- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- Sheldon Moldoff
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Joe Letterese (balloons on page 1 only); Vivian Berg ?
- Genre
- superhero
- Characters
- Legion of Super-Pets [Super-Horse [Comet]; Streaky; Super-Monkey [Beppo]; Krypto; Proty II [also as Chameleon Boy]]; Legion of Super-Heroes [Saturn Girl; Mon-El; Superboy; Sun Boy; Ultra Boy; Brainiac 5]
- Synopsis
- Proty II passes his final tests and is admitted into the Legion of Super-Pets.
- Reprints
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Ira Schnapp
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Superboy; Sun Boy; Saturn Girl; Ultra Boy; Chameleon Boy; Element Lad]
- Reprints
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Sun Boy; Saturn Girl; Superboy; Phantom Girl; Chameleon Boy; Brainiac 5; Ultra Boy; Element Lad]; Proty II; Spider Girl; Pete Ross; Jimmy Olsen; Double-Header; Jor-El (in flashback)
- Synopsis
- Proty II comes up with a contest to determine the next Legion leader.
- Reprints
First appearance of Spider Girl and Double-Header.
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Phantom Girl; Saturn Girl; Sun Boy; Element Lad; Superboy; Ultra Boy; Chameleon Boy; Shrinking Violet; Triplicate Girl; Light Lass; Invisible Kid; Matter-Eater Lad; Colossal Boy; Cosmic Boy; Lightning Lad]; Jimmy Olsen [also as Elastic Lad]; Lucy Lane; Proty II; Pete Ross
- Synopsis
- Saturn Girl solves Proty's puzzle and remains Legion leader.
- Reprints
- Pencils
- Curt Swan
- Inks
- Sheldon Moldoff
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Ira Schnapp
- Genre
- superhero
- Characters
- Superboy; Heroes of Lallor [Beast Boy; Evolvo Lad; Gas Girl]
- Reprints
- Script
- Edmond Hamilton
- Pencils
- John Forte (signed)
- Inks
- John Forte (signed)
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Vivian Berg ?
- Genre
- superhero
- Characters
- Heroes of Lallor [Beast Boy; Gas Girl; Evolvo Lad; Duplicate Boy; Life Lass]; Legion of Super-Heroes [Superboy; Shrinking Violet; Star Boy; Saturn Girl; Sun Boy; Chameleon Boy; Invisible Kid]; Marden King
- Synopsis
- Marden King tricks the Heroes of Lallor into fighting the Legion, in revenge for the Legion's earlier defeat of his brother Jungle King.
- Reprints
- Script
- Edmond Hamilton
- Pencils
- John Forte (signed)
- Inks
- John Forte (signed)
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Vivian Berg ?
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Colossal Boy; Ultra Boy; Mon-El; Shrinking Violet; Superboy; Star Boy; Invisible Kid; Element Lad; Cosmic Boy; Chameleon Boy; Sun Boy; Lightning Lad]; Heroes of Lallor [Duplicate Boy; Gas Girl; Life Lass; Beast Boy; Evolvo Lad]; Marden King
- Synopsis
- The Heroes of Lallor realize they have been tricked and turn on Marden King.
- Reprints
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Vivian Berg ?
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Sun Boy; Star Boy; Cosmic Boy; Brainiac 5; Matter-Eater Lad; Triplicate Girl; Lightning Lad; Phantom Girl; Shrinkng Violet; Light Lass; Invisible Kid; Mon-El; Superboy (in flashback)]; Lex Luthor
- Synopsis
- Lex Luthor convinces the Legion he has come to the future from a time before he turned evil.
- Reprints
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Vivian Berg ?
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Matter-Eater Lad; Triplicate Girl; Phantom Girl; Brainiac 5; Light Lass; Colossal Boy; Sun Boy; Star Boy; Element Lad; Mon-El; Shrinking Violet; Lightning Lad; Invisible Kid; Cosmic Boy; Superboy; Supergirl; Saturn Girl; Ultra Boy; Chameleon Boy; Element Lad]; Lex Luthor; Proty II
- Synopsis
- Luthor seemingly dissolves the Legionnaires, but they have the last laugh on him.
- Reprints
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Ira Schnapp
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Saturn Girl; Light Lass; Shrinking Violet; Triplicate Girl; Supergirl; Superboy; Element Lad (statue); Star Boy (statue); Invisible Kid (statue); Brainiac 5 (statue); Cosmic Boy (statue); Chameleon Boy (statue)]
- Reprints
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Light Lass; Triplicate Girl; Shrinking Violet; Supergirl; Phantom Girl; Saturn Girl; Ultra Boy; Mon-El; Lightning Lad; Colossal Boy; Matter-Eater Lad; Element Lad; Invisible Kid; Brainiac 5; Cosmic Boy; Superboy]; Proty II
- Synopsis
- The girl Legionnaires turn on the boys.
- Reprints
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Saturn Girl; Light Lass; Triplicate Girl; Supergirl; Shrinking Violet; Superboy; Chameleon Boy; Star Boy; Phantom Girl; Ultra Boy; Mon-El; Cosmic Boy; Brainiac 5; Element Lad]; Queen Azura
- Synopsis
- The source of the plot is revealed and the boys are restored.
- Reprints
- Pencils
- Curt Swan
- Inks
- Sheldon Moldoff
- Colors
- Rick Taylor; Tom McCraw
- Letters
- ?
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Superboy; Invisible Kid; Element Lad; Ultra Boy; Brainiac 5; Chameleon Boy]; Lana Lang; Pete Ross
- Reprints
- Script
- Jerry Siegel
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Superboy; Legion of Super-Heroes [Chameleon Boy; Ultra Boy; Invisible Kid; Brainiac 5; Element Lad]; Police Chief Parker; Lana Lang
- Synopsis
- Superboy accidentally arrives in a parallel world where the Legion are villains.
- Reprints
- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Sun Boy; Light Lass; Chameleon Boy; Cosmic Boy; Matter-Eater Lad; Saturn Girl; Superboy; Mon-El; Ultra Boy; Lightning Lad; Brainiac 5]; Lone Wolf
- Synopsis
- While investigating robberies on Zoon, the Legionnaires extend an invitation of membership to Lone Wolf, but he refuses.
- Reprints
Lone Wolf later returns as Timber Wolf. Cover of this issue not reprinted in this volume as it reflects the Superboy solo story.
- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- Sheldon Moldoff
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Light Lass; Cosmic Boy; Mon-El; Chameleon Boy; Sun Boy; Brainiac 5; Ultra Boy; Lightning Lad]; Lone Wolf
- Synopsis
- Lone Wolf reveals that he refused membership because he is an android, but the Legion discovers he is not what he thinks.
- Reprints
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Rick Taylor; Tom McCraw
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Mon-El; Ultra Boy; Superboy]
- Reprints
- Script
- Jerry Siegel
- Pencils
- Jim Mooney
- Inks
- Jim Mooney
- Colors
- Rick Taylor; Tom McCraw
- Letters
- David Huffine
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Triplicate Girl; Sun Boy; Superboy; Cosmic Boy; Triplicate Girl; Invisible Kid; Star Boy; Shrinking Violet; Mon-El; Ultra Boy; Lightning Lad; Phantom Girl]; Command Kid; Bouncing Boy
- Synopsis
- Command Kid joins the Legion, but his arrogance puts off some of the Legionnaires. Star Boy, however, asks Command Kid to help him become as powerful as he is.
- Reprints
- Script
- Jerry Siegel
- Pencils
- Jim Mooney
- Inks
- Jim Mooney
- Colors
- Rick Taylor; Tom McCraw
- Letters
- David Huffine
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Sun Boy; Lightning Lad; Shrinking Violet; Cosmic Boy; Invisible Kid; Star Boy; Triplicate Girl; Superboy; Phantom Girl; Ultra Boy; Saturn Girl; Element Lad]; Command Kid
- Synopsis
- More Legionnaires submit to Command Kid's treatment, but Saturn Girl and Element Lad return with the solution to the mystery of Command Kid just in time.
- Reprints
- Script
- Mark Waid
- Letters
- typeset
Short biographies of the primary writers and artists of the stories in this volume.
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Tom McCraw
- Letters
- Ira Schnapp (other three covers); typeset; ? (Jimmy Olsen cover)
- Genre
- superhero
- Characters
- Jimmy Olsen [as Elastic Lad]; Superman; Legion of Super-Heroes [Saturn Girl; Light Lass; Triplicate Girl; Superboy; Lightning Lad; Star Boy; Mon-El; Shrinking Violet; Supergirl; Element Lad (statue); Invisible Kid (statue); Brainiac 5 (statue); Cosmic Boy (statue); Chameleon Boy (statue)]; Legion of Super-Pets [Super-Horse [Comet]; Streaky; Krypto; Super-Monkey [Beppo]; Proty II [partly as Superboy]]
- Reprints
Four small cover reproductions on back cover.