- Script
- Robert Kanigher
- Pencils
- Carmine Infantino
- Inks
- Joe Kubert
- Colors
- ?
- Letters
- ?
- Genre
- superhero
- Characters
- Flash [Barry Allen] (first appearance, origin); Flash [Jay Garrick] (on a comic book cover); Iris West (first appearance); The Turtle Man [later The Turtle] (villain)
- Reprints
First appearance of Barry Allen as the Flash.
- Script
- Jack Kirby (plot, script); Dave Wood (script rewrite)
- Pencils
- Jack Kirby
- Inks
- Rosalind Kirby (black fill-ins); ?
- Colors
- ?
- Letters
- Ben Oda
- Genre
- adventure
- Characters
- Challengers of the Unknown [Ace Morgan; Prof Haley; Red Ryan; Rocky Davis] (first appearance, origin); sailors; citizens; VILLAIN: Mr. Morelian (first appearance; dies)
- Synopsis
- Four men escape a plane crash unharmed, decide they are living on borrowed time and vow to use it challenging the unknown. In their first case, they’re asked to open the four chambers of an ancient box. The chambers release: a stone giant that Prof. destroys by pure thought, a sun that freezes by consuming nearby heat that Red traps in a vacuum chamber, and a device that snarls things in plastic ribbons but is controlled by a dial on its container. Morelian opens the fourth and removes a ring, claiming the box says it contains immortality. He is wrong: immortality was in the box, not the ring.
- Reprints
1) Credits updated 10/06 by Bob Hughes. Previously inker listed as Marvin Stein. Per Stein's conversations with Greg Theakston, he did not ink any Challengers stories. 2) An epilogue occurs in Secret Origins 12 (1987), when the Challengers are reunited with the box to solve its final mystery. 3) Letters credit from Rodrigo Baeza via the editor e-mail list on March 5, 2007.
- Script
- Otto Binder
- Pencils
- Ruben Moreira
- Inks
- Al Plastino
- Colors
- ?
- Letters
- ?
- Genre
- superhero
- Characters
- Superman [Clark Kent]; Lois Lane; Conners [Con]
- Synopsis
- Superman hopes that Lois' constant snooping to find his identity will provide evidence to convince "Con" Conners that he is wrong in believing that Clark Kent is Superman.
- Reprints
artist changed from Ruben Moreira by Bob Hughes 3/06
- Script
- Gardner Fox; Edmond Hamilton (co-plot, uncredited)
- Pencils
- Mike Sekowsky
- Inks
- Frank Giacoia; Joe Giella
- Colors
- ?
- Letters
- ?
- Genre
- science fiction
- Characters
- Adam Strange (introduction, origin); Rann (planet, introduction)
- Reprints
Page 8 and page 15 are 2/3-pages. Origin & 1st appearance Adam Strange. See notes at original printing for the creative credits listed.
- Script
- Gardner Fox; Edmond Hamilton (co-plot, uncredited)
- Pencils
- Mike Sekowsky
- Inks
- Frank Giacoia; Joe Giella
- Colors
- ?
- Letters
- ?
- Genre
- science fiction
- Reprints
Logo is Adventures on Other Worlds. See notes at original printing for the creative credits listed.
- Pencils
- Irv Novick
- Inks
- Irv Novick
- Colors
- ?
- Letters
- ?
- Genre
- adventure; animal
- Reprints
Cover pencils and inks credits confirmed from Julius Schwartz's editorial records, provided by DC Comics.