| Issue | #10 |
| Published | April-May 1971 |
| Frequency | bi-monthly |
| Cover Price | 0.25 USD |
| Pages | 68 |
| Editing | Julius Schwartz |
| Genre | science fiction |
| Pencils | Murphy Anderson |
| Inks | Murphy Anderson |
| 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 | Bernard Sachs |
| 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) #56 (May 1955) |
| Genre | science fiction |
| Script | Joe Millard |
| Pencils | Murphy Anderson |
| Inks | Murphy Anderson |
| 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 (DC, 1951 series) #46 (September 1958) |
| Genre | fact |
| Reprinted | from ? |
| Genre | science fiction |
| Script | Gardner Fox |
| Pencils | Mike Sekowsky |
| 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 (DC, 1950 series) #129 (June 1961) |
| Genre | science fiction |
| Script | Gardner Fox |
| Pencils | Carmine Infantino |
| Inks | Carmine Infantino |
| 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 (DC, 1951 series) #14 (June-July 1953) |
| Genre | fact |
| Reprinted | from ? |
| Genre | science fiction |
| Script | John Broome |
| 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 Strange Adventures (DC, 1950 series) #112 (January 1960) |
| Script | Julius Schwartz [as JS] |
| Letters | Typeset |
| Notes | Letters of comment from readers Mark Colella, Bernard G. Williams, Matthew Grahan and Gregory Kent, with replies from Schwartz. |
| Genre | science fiction |
| Script | Otto Binder |
| Pencils | Manny Stallman |
| Inks | John Giunta |
| 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 (DC, 1951 series) #49 (February 1959) |
| Genre | fact |
| Reprinted | from ? |
| 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 (DC, 1951 series) #73 (February 1962) |
| Genre | fact |
| Colors | ? (painting) |
| Reprinted | from ? |