| Issue | #51 |
| Published | January 1991 |
| Cover Price | 1.00 USD; 1.25 CAD |
| Pages | 36 |
| Editing | Mike Carlin; Dan Thorsland (assistant) |
| Notes | The first time a Superman book uses the "triangle number" on the cover. Superman 1991 Story Arc #1. 1991 Triangle #1. |
| Characters | Superman [Clark Kent; Kal-El]; Mr. Z |
| Genre | Superhero |
| Pencils | Jerry Ordway (signed) |
| Inks | Jerry Ordway (signed) |
| Colors | Jerry Ordway (signed) |
| Notes | The first time a Superman book uses the "triangle number" on the cover. Superman 1991 Story Arc #1. 1991 Triangle #1. |
| Characters | Superman [Clark Kent; Kal-El]; Lois Lane; Perry White; Jimmy Olsen; Cat Grant; Bibbo Bibbowski; Sam Foswell; Allie; Jose Delgado; Tobin; Fabrio; Ilya Targov (first appearance); VILLAIN: Mr. Z [also as George Bailey] (first appearance) |
| Synopsis | An immortal man named Mr. Z tries to confine Superman to his personal collection of people out of history in his crystal. |
| Genre | Superhero |
| Script | Jerry Ordway |
| Pencils | Jerry Ordway |
| Inks | Dennis Janke |
| Colors | Glenn Whitmore |
| Letters | John Costanza |
| Script | Michael Eury |
| Letters | typeset |
| Notes | Letters from readers - Nic Melone, Doug Shaw, Justin Vandemark, Jacob Gilbert, Justin Holcomb, Marc Harsha and J.D. Dyer - and responses from Michael Eury. |