| 0 | The Secret Conquest of the Earth! | cover | 1 | pencils: Arthur F. Peddy; inks: Bernard Sachs | Justice Society of America [Hawkman [Carter Hall]; Wonder Woman [Diana Prince]; Green Lantern [Alan Scott]; The Atom [Al Pratt]]; Mr. Prince |
| 1 | - | promo (ad from the publisher) | 1 | letters: typeset | |
| 2 | The Secret Conquest of the Earth! [Part I] | comic story | 8 | script: John Broome; pencils: Irwin Hasen, Arthur F. Peddy; inks: Frank Giacoia, Bernard Sachs | Justice Society of America [The Flash [Jay Garrick]; Green Lantern [Alan Scott]; The Atom [Al Pratt]; Wonder Woman [Diana Prince]; Black Canary [Dinah Drake]; Hawkman [Carter Hall]; Dr. Mid-Nite [Dr. Charles McNider]]; Professor Matthews (anthropologist); The Four Kings of the Ancient Super-Race [Mr |
| 4 | Hollywood's Top Adventure Star! | promo (ad from the publisher) | 1 | | |
| 5 | The Secret Conquest of the Earth! Part II | comic story | 10 | script: John Broome; pencils: Arthur F. Peddy; inks: Bernard Sachs | Justice Society of America [Hawkman [Carter Hall]; Wonder Woman [Diana Prince]; Black Canary [Dinah Drake]; The Flash [Jay Garrick]]; unnamed South American leader; The Blue Shirts (villains, all reform); The Gladiators (villains, all reform); Mr. Prince (villain, Super-Race King); Mr. Monarch (vill |
| 7 | The Secret Conquest of the Earth! Part III | comic story | 14 | script: John Broome; pencils: Arthur F. Peddy; inks: Bernard Sachs | Justice Society of America [Dr. Mid-Nite; The Atom [Al Pratt]; Green Lantern [Alan Scott]; Hawkman [Carter Hall]; Black Canary [Dinah Drake]; Wonder Woman [Diana Prince]; The Flash [Jay Garrick]]; Professor Matthews; unnamed African Sultan; Robert; Marie (Robert's husband); The Cavaliers (villains, |
| 8 | Illinois | cartoon | 0.5 | script: Martin Naydel; pencils: Martin Naydel; inks: Martin Naydel | |
| 9 | To All Junior Justice Society of America Members | promo (ad from the publisher) | 0.5 | | |
| 10 | The Incredible Death Valley Scotty | comic story | 2 | script: Gardner Fox; pencils: John Giunta; inks: John Giunta | Death Valley Scotty |
| 11 | Watchdogs of the Sea | text article | 2 | script: Julius Schwartz; pencils: Raymond Perry; inks: Raymond Perry; colors: Raymond Perry | |
| 12 | The Principle of the Steam Turbine | activity | 0.67 | pencils: Irwin Hasen; inks: Bob Oksner | The Atom, Al Pratt |
| 14 | The Last Man on Earth! | comic story | 5 | script: Howard Purcell; pencils: Howard Purcell; inks: Frank Giacoia | Johnny Peril |
| 15 | Feature Films | promo (ad from the publisher) | 1 | | |
| 16 | Superman's Code for Buddies | public service announcement | 1 | script: Jack Schiff; pencils: Al Plastino; inks: Al Plastino; letters: Ira Schnapp | Clark Kent, Superman |