| 0 | Z as in Zatanna and Zero Hour! | cover | 1 | pencils: Mike Sekowsky; inks: Joe Giella; letters: Ira Schnapp | The Atom, Batman, Ralph Dibny, The Elongated Man, Ray Palmer, Bruce Wayne, Zatanna |
| 1 | Z -- as in Zatanna -- and Zero Hour! | comic story | 22 | script: Gardner Fox; pencils: Mike Sekowsky; inks: Sid Greene; letters: Gaspar Saladino | Allura First, The Atom, Batman, Ralph Dibny, The Elongated Man, Dick Grayson, Green Lantern, Hawkman, Katar Hol, Hal Jordan, Ray Palmer, Robin, Bruce Wayne, Zatanna |
| 2 | Sgt. Rock's 6 Battle Stars | promo (ad from the publisher) | 0.5 | pencils: Joe Kubert; inks: Joe Kubert; letters: Ira Schnapp | |
| 3 | Do It Cool! | public service announcement | 0.5 | script: Henry Boltinoff; pencils: Henry Boltinoff; inks: Henry Boltinoff; letters: Henry Boltinoff | |
| 4 | Peace on Earth | public service announcement | 1 | script: Jack Schiff; letters: Ira Schnapp | |
| 5 | Batman and Hawkman | promo (ad from the publisher) | 0.5 | pencils: Carmine Infantino; inks: Joe Giella; letters: Ira Schnapp | |
| 6 | Batman Pin-Ups | promo (ad from the publisher) | 1 | pencils: Carmine Infantino; inks: Murphy Anderson, Joe Giella; letters: Ira Schnapp | Batman; Robin; Joker; Riddler; Penguin |
| 7 | - | letters page | 1 | script: Julius Schwartz | |
| 8 | - | in-house column | 0.67 | letters: typeset | |
| 9 | - | statement of ownership | 0.33 | script: Irwin Donenfeld | |
| 10 | - | activity | 0.5 | script: Henry Boltinoff; pencils: Henry Boltinoff; inks: Henry Boltinoff; letters: Henry Boltinoff | |
| 11 | - | promo (ad from the publisher) | 0.5 | pencils: Curt Swan, Carmine Infantino; inks: George Klein, Joe Giella; letters: Ira Schnapp | |
| 12 | JLA Mail Room -- Extra | letters page | 1 | script: Julius Schwartz | |