| Issue | #20 |
| Published | December 1972-January 1973 |
| Cover Price | 0.20 USD |
| Pages | 36 |
| Editing | Julius Schwartz |
| Notes | Cover art credits confirmed from Julius Schwartz's editorial records, provided by DC Comics. |
| Genre | science fiction |
| Pencils | Nick Cardy |
| Inks | Nick Cardy |
| Notes | Cover art credits confirmed from Julius Schwartz's editorial records, provided by DC Comics. |
| Genre | science fiction |
| Script | Gardner Fox |
| Pencils | Mike Sekowsky |
| Inks | Joe Giella |
| Notes | Credits confirmed from Julius Schwartz's editorial records, provided by DC Comics. |
| Reprinted | from Strange Adventures (DC, 1950 series) #105 (June 1959). |
| Script | Julius Schwartz |
| Pencils | ? (illo) |
| Inks | ? (illo) |
| Letters | typeset |
| Notes | LOC from readers Charles T. Smith, Guy H. Lillian III and Bob Abrahams. |
| Genre | science fiction |
| Script | Gardner Fox |
| Pencils | Gil Kane |
| Inks | Joe Giella |
| Notes | Credits confirmed from Julius Schwartz's editorial records, provided by DC Comics. |
| Reprinted | from Mystery in Space (DC, 1951 series) #14 (June-July 1953). |
| Characters | Star Rovers [Homer Glint; Karel Sorensen; Rick Purvis] |
| Genre | science fiction |
| Script | Gardner Fox |
| Pencils | Sid Greene |
| Inks | Sid Greene |
| Notes | Credits confirmed from Julius Schwartz's editorial records, provided by DC Comics. |
| Reprinted | from Mystery in Space (DC, 1951 series) #86 (September 1963). |