| Issue | #646 |
| Published | October 1989 |
| Cover Price | 0.75 USD; 0.95 CAD |
| Pages | 36 |
| Editing | Mike Carlin; Jon Peterson (associate) |
| Characters | Superman |
| Genre | Superhero |
| Pencils | George Perez (signed) |
| Inks | George Perez (signed) |
| Characters | Superman [Clark Kent; Kal-El]; VILLAINS: Brainiac [Milton Fine; Vril Dox]; Gretchen Kelley; Sydney Happersen |
| Synopsis | Superman must stop an alien creature. |
| Genre | Superhero |
| Script | Roger Stern (script); Keith Giffen (plot) |
| Pencils | Keith Giffen |
| Inks | Dennis Janke |
| Colors | Glenn Whitmore |
| Letters | Bill Oakley |
| Script | Mike Carlin |
| Letters | typeset |
| Notes | Letters from readers - Sean Twist, The T.A.P., Kevin Sharp, Dean Husein, Blazer English, Jaye, Shawn Harris and Melissa Page - and responses from Mike Carlin. |