| Issue | #21 |
| Published | May 1980 |
| Cover Price | 0.40 |
| Pages | 36 |
| Editing | Julius Schwartz |
| Characters | Superman; Elongated Man; Fortress of Solitude; Jor-El (statue); Lara (statue) |
| Genre | Superhero |
| Pencils | Ross Andru (signed) |
| Inks | Dick Giordano (signed) |
| Characters | Superman; The Elongated Man; Fortress of Solitude; Jor-El (statue); Lara (statue); Sue Dibny (flashback); green kryptonite; aliens (villains) |
| Genre | Superhero |
| Script | Gerry Conway |
| Pencils | Joe Staton |
| Inks | Frank Chiaramonte |
| Colors | Jerry Serpe |
| Letters | Milt Snapinn |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. |
| Letters | typeset |