| Issue | #18 |
| Published | April-May 1965 |
| Frequency | Bi-Monthly |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Julius Schwartz |
| Characters | The Atom [Ray Palmer] |
| Genre | superhero |
| Pencils | Gil Kane |
| Inks | Murphy Anderson |
| Characters | The Atom [Ray Palmer]; The Black Phantom (villain); Professor Morton Oldham; Jean Loring |
| Genre | superhero |
| Script | Gardner Fox |
| Pencils | Gil Kane |
| Inks | Sid Greene |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. |
| Synopsis | A spiral-type galaxy colliding with an elliptical-type Galaxy and the constellation Cygnus. |
| Notes | Two panels, in between pages 6 and 7 of sequence 1. |
| Genre | fact |
| Script | Julius Schwartz |
| Pencils | Morris Waldinger |
| Inks | Tom Nicolosi |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (May 2007). |
| Script | Julius Schwartz [as The Editor] |
| Letters | Typeset |
| Notes | Letters of comment from readers Paul Bakulski and Guy H. Lillian III, with replies from Schwartz. |
| Characters | The Atom [Ray Palmer]; Jean Loring; Hightop Harry (villain); Melissa |
| Genre | superhero |
| Script | Gardner Fox |
| Pencils | Gil Kane |
| Inks | Sid Greene |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. |
| Reprinted | in Action Comics (DC, 1938 series) #449 (July 1975) |
| Letters | Typeset |
| Notes | Shares the page with page 11 of sequence 5. |