| Issue | #240 |
| Published | January-February 1973 |
| Cover Price | 0.20 |
| Pages | 36 |
| Editing | Julius Schwartz |
| Notes | Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. [July 2007] |
| Genre | science fiction |
| Pencils | Michael William Kaluta |
| Inks | Michael William Kaluta |
| Notes | Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. [July 2007] |
| Genre | science fiction |
| Script | John Broome |
| Pencils | Carmine Infantino |
| Inks | Joe Giella |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. [July 2007] |
| Reprinted | From Mystery In Space #40 (October-November 1957). |
| Genre | science fiction |
| Script | Gardner Fox |
| Pencils | Sid Greene |
| Inks | Bernard Sachs |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. [July 2007] |
| Reprinted | From Strange Adventures #74 (November 1956). |
| Genre | science fiction |
| Script | Gardner Fox |
| Pencils | Carmine Infantino |
| Inks | Murphy Anderson |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. [July 2007] |
| Reprinted | From Mystery In Space #80 (December 1962). |