| Issue | #1 |
| Published | April-May 1958 |
| Frequency | bi-monthly |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | Whitney Ellsworth (credited); Jack Schiff (actual) |
| Notes | Like many DC first issues, there is no number on the cover. |
| Characters | Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis] |
| Genre | Adventure |
| Pencils | Jack Kirby |
| Inks | Jack Kirby |
| Letters | Ira Schnapp |
| Notes | 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. |
| Reprinted | in Challengers of the Unknown Archives (DC, 2003 series) #1 (July 2003); in Showcase Presents Challengers of the Unknown (DC, 2006 series) #1 |
| Characters | Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis]; June Robbins (called June Walker); Olan Tagorian |
| Genre | Adventure |
| Script | Jack Kirby |
| Pencils | Jack Kirby |
| Inks | Jack Kirby?; Roz Kirby (blacks) |
| Notes | 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. |
| Reprinted | in Challengers of the Unknown Archives (DC, 2003 series) #1 (July 2003); in Showcase Presents Challengers of the Unknown (DC, 2006 series) #1 |
| Characters | Challengers of the Unknown [Ace Morgan; Professor Haley; Red Ryan; Rocky Davis] |
| Genre | Adventure |
| Script | Jack Kirby |
| Pencils | Jack Kirby |
| Inks | Jack Kirby?; Roz Kirby (blacks) |
| Notes | 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. |
| Reprinted | in Superman Presents World's Finest Comic Monthly (K. G. Murray, 1965 series) #105; in Challengers of the Unknown (DC, 1973 series) #79 (March-April 1973); in Challengers of the Unknown Archives (DC, 2003 series) #1 (July 2003); in Showcase Presents Challengers of the Unknown (DC, 2006 series) #1 |