| 0 | When Krypto Became Superboy's Master! | cover | 1 | pencils: Curt Swan; inks: George Klein; letters: Gaspar Saladino | Clark Kent, Krypto, Lana Lang, Superboy |
| 1 | - | promo (ad from the publisher) | 1 | letters: typeset | Clark Kent, Superman |
| 2 | The Doom of the Super-Heroes! | comic story | 8.67 | script: Edmond Hamilton; pencils: John Forte; inks: John Forte; letters: Milton Snapinn | Gim Allon, Imra Ardeen, Jan Arrah First, Bouncing Boy, Brainiac 5, Chameleon Boy, Colossal Boy, Cosmic Boy, Reep Daggle, Salu Digby, Querl Dox, Luornu Durgo, Element Lad First, Lar Gand |
| 4 | A Tree Grows on Second Street | public service announcement | 1 | script: Jack Schiff; pencils: Sheldon Moldoff; inks: Sheldon Moldoff; letters: Joe Letterese | Badger Club [Fred Clark; others] |
| 5 | - | promo (ad from the publisher) | 1 | pencils: Curt Swan; inks: George Klein; letters: Ira Schnapp | Batman, Clark Kent, Superman, Bruce Wayne |
| 6 | [The Doom of the Super-Heroes!] Part II Last Stand of the Legion! | comic story | 7.67 | script: Edmond Hamilton; pencils: John Forte; inks: John Forte; letters: Milton Snapinn | Gim Allon, Imra Ardeen, Bouncing Boy, Brainiac 5, Chameleon Boy, Colossal Boy, Cosmic Boy, Reep Daggle, Querl Dox, Lar Gand, Invisible Kid, Clark Kent, Rokk Krinn, Lightning Lass First |
| 8 | - | comic story | 0.67 | script: Henry Boltinoff; pencils: Henry Boltinoff; inks: Henry Boltinoff; letters: Henry Boltinoff | Clark Kent, Little Pete, Superman |
| 9 | - | promo (ad from the publisher) | 0.33 | | Johnny DC, Clark Kent, Lois Lane, Jimmy Olsen, Superman |
| 12 | - | letters page | 1 | letters: typeset | |
| 13 | When Krypto Was Superboy's Master! | comic story | 7.67 | script: George Kashdan; pencils: George Papp; inks: George Papp; letters: Joe Letterese | Clark Kent, Krypto, Lana Lang, Lewis Lang, Superboy |