| 0 | Invasion of the Cyclops-Men of Mars | cover | 1 | pencils: Bob Powell; inks: Bob Powell | |
| 1 | - | promo (ad from the publisher) | 1 | script: ? [as Jumbo Jim]; letters: typeset | |
| 2 | - | comic story | 5 | pencils: Alex Blum; inks: Alex Blum | The Stickers (villains, introduction, death); Red Comet |
| 3 | - | comic story | 5 | pencils: Dan Zolnerowich, Art Peddy; inks: Dan Zolnerowich | Crag (villain, introduction, death); the Golden Avengers (villains, introduction, death); Nelson Cole; President Largo |
| 4 | - | comic story | 5 | script: Herman Bolstein | Auro, Hardwich |
| 5 | The Rockmen of Jupiter | comic story | 5 | pencils: Henry Kiefer; inks: Henry Kiefer | The Rock Men of Jupiter (villains, introduction); Mary Joyce (introduction); Spurt Hammond; President of Earth; Commander Pary |
| 6 | Lepus and the Colliding Planets | comic story | 9 | script: Bob Jordan; pencils: Bob Jordan; inks: Bob Jordan; letters: Fletcher Hanks | Buzz Crandall; Sandra Hale; Lepus the Fiend (villain, introduction, death) |
| 7 | Lost World of Time | text story | 2 | script: Lin Davies; pencils: Witmer Williams; inks: Witmer Williams | Dexter Ames; Dr. Phillips; Morgan; Gunner Hatch |
| 8 | - | comic story | 4 | script: ? [as Allison Brant] | Prime Minister of Mars (villain, introduction); King of Mars (introduction, death); Fero |
| 9 | The Menace of the Magno-Universe | comic story | 8 | script: Walt Scott; pencils: Sid Greene; inks: Sid Greene | Explorer from a macro-universe (introduction); woman from a macro-universe (introduction); Dr. Don Granval; Claire |
| 10 | - | comic story | 7 | script: Charles Quinlan Sr.; pencils: Charles Quinlan Sr.; inks: Charles Quinlan Sr. | Bart Clay (villain, death); Hugo (villain, death); other spies (villain, death); Jim; Crash Barker; Betty; Barrow |
| 11 | - | comic story | 7 | pencils: Witmer Williams; inks: Witmer Williams | Hal (villain, introduction); gang of smugglers (villains, introduction); Planet Payson; Kneely; Jim |
| 12 | Invasion of the Cyclops-Men of Mars | comic story | 7 | pencils: Arthur Peddy; inks: Arthur Peddy | A Martian Cyclops (villain, introduction, death); Flint Baker; Mimi |
| 13 | - | promo (ad from the publisher) | 1 | letters: typeset | Sheena |