| Issue | #644 |
| Published | August 1989 |
| Cover Price | 0.75 USD; 0.95 CAD |
| Pages | 36 |
| Editing | Mike Carlin; Jon Peterson (associate) |
| Characters | Matrix [as Superman] |
| Genre | Superhero |
| Pencils | George Perez (signed) |
| Inks | George Perez (signed) |
| Characters | Superman [Clark Kent; Kal-El]; Jonathan Kent; Martha Kent; Lana Lang; Matrix [as Superman; Supergirl]; Kitty Faulkner [Rampage]; Starman [Will Payton]; Alvin Fitch (first appearance) |
| Synopsis | Matrix attacks Superman, believing she is the one and only Superman and he is an imposter. Once things are resolved, Matrix leaves Earth. |
| Genre | Superhero |
| Script | Roger Stern; George Perez |
| Pencils | George Perez |
| Inks | Brett Breeding |
| Colors | Glenn Whitmore |
| Letters | Bill Oakley |