| Issue | #12 |
| Published | August-September 1971 |
| Cover Price | 0.25 |
| Pages | 68 |
| 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 | Joe Kubert |
| Inks | Joe Kubert |
| Notes | Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. [July 2007] |
| Genre | science fiction |
| Script | Gardner Fox |
| Pencils | Carmine Infantino |
| Inks | Joe Giella |
| Notes | Cover story. Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (April 2007). |
| Reprinted | from Strange Adventures (DC, 1950 series) #147 (December 1962) |
| Genre | science fiction |
| Script | John Broome |
| Pencils | Sy Barry |
| Inks | Sy Barry |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (April 2007). |
| Reprinted | from Mystery in Space #27 (DC, August-September 1955). |
| Genre | science fiction |
| Script | Ed (France) Herron |
| Pencils | Carmine Infantino |
| Inks | Bernard Sachs |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (April 2007). |
| Reprinted | from Strange Adventures #89 (DC, February 1958) |
| Genre | science fiction |
| Script | Otto Binder |
| Pencils | Sid Greene |
| Inks | Joe Giella |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (April 2007). |
| Reprinted | from Strange Adventures #63 (DC, December 1955) |
| Genre | science fiction |
| Script | Gardner Fox |
| Pencils | Sid Greene |
| Inks | Sid Greene |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (April 2007). |
| Reprinted | from Mystery in Space #78 (DC, Septemebr 1962) |