| Issue | #50 |
| Published | March 1959 |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | Julius Schwartz |
| Notes | Cover pencils credit from Julius Schwartz's editorial records, provided to the GCD by DC Comics; the records imply that Frank Giacoia was paid for the inks (25 January 2008) |
| Genre | science fiction |
| Pencils | Gil Kane |
| Inks | Joe Giella |
| Notes | Cover pencils credit from Julius Schwartz's editorial records, provided to the GCD by DC Comics; the records imply that Frank Giacoia was paid for the inks (25 January 2008) |
| Genre | science fiction |
| Script | Gardner Fox |
| Pencils | Gil Kane |
| Inks | Bernard Sachs |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (April 2007). |
| Reprinted | In From Beyond the Unknown (DC, 1969 series) #6 (August-September 1970) |
| Notes | Sequence added by Ed Boner, January 2009. |
| Script | Otto Binder |
| Pencils | John Giunta |
| Inks | John Giunta |
| Reprinted | in Strange Adventures (DC, 1950 series) #227 (November-December 1970) |
| Genre | Fact |
| Notes | Information for this sequence from Arthur Lortie, September 2008. Location from Ed Boner, January 2009. |
| Letters | typeset |
| Notes | Letters asking scientific questions and responses. Sequence added by Ed Boner, January 2009. |
| Genre | science fiction |
| Script | Otto Binder |
| Pencils | Frank Giacoia |
| Inks | Frank Giacoia |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (April 2007). |
| Reprinted | In From Beyond the Unknown (DC, 1969 series) #9 (February-March 1971) |