| Issue | #1 |
| Published | January 1940 |
| Cover Price | 0.10 USD |
| Pages | 68 |
| Editing | ? |
| Genre | science fiction |
| Pencils | Lou Fine |
| Inks | Lou Fine |
| Notes | Lou Fine cover pencil and ink credits confirmed by one-time owner of the original art, Roger Hill, and confirmed to him by a conversation he had with Will Eisner (January 5, 2010). |
| Reprinted | in Planet Comics (Pacific Comics, 1984 series) #1 |
| Characters | Fletcher "Flint" Baker (introduction, origin); Harry Parks (introduction); Phil Godwin (introduction); Cliff Grant (introduction, death); Mimi Wilson (introduction); King of Mars (introduction); Princess Viga; Sarko (villian, introduction, death) |
| Genre | science fiction |
| Pencils | Dick Briefer |
| Inks | Dick Briefer |
| Characters | Auro [Hardwich] (introduction, origin); Prof. John Hardwich (introduction, death, Auro's father); Mrs. John Hardwich (introduction, death, Auro's mother; Martha Gale; King of Neptune (villian, introduction) |
| Genre | science fiction |
| Pencils | Malcolm Kildale |
| Inks | Malcolm Kildale |
| Characters | The Red Comet (introduction); Zagu and the Spidermen (villian, introduction, death) |
| Genre | science fiction |
| Pencils | Ken Jackson |
| Inks | Ken Jackson |
| Characters | Capt. Nelson Cole (introduction); Bud (Cole's sidekick, introduction); Zan (villian, introduction); Zan's woman (villian, introduction) |
| Genre | science fiction |
| Pencils | Alex Blum |
| Inks | Alex Blum |
| Characters | Spurt Hammond (introduction); The Lunerzons (villian, introduction); The Mooniacs (villian, introduction) |
| Genre | science fiction |
| Pencils | Henry Kiefer |
| Inks | Henry Kiefer |
| Characters | Buzz Crandall (introduction); Dr. Curan (introduction); Nancy Curan (Dr. Curan's daughter, introduction); The Sharkmen (villian, introduction, death) |
| Genre | science fiction |
| Characters | Quorak (villian, introduction); Lt. Gary Blake (introduction); Joan Perry (introduction, only appearance) |