| Issue | #308 |
| Published | February 1977 |
| Cover Price | 0.30 |
| Pages | 36 |
| Editing | Julius Schwartz |
| Characters | Superman; Radion |
| Genre | superhero |
| Pencils | Neal Adams |
| Inks | Neal Adams |
| Characters | Superman; Protector (villain); Supergirl (guest star); Fortress of Solitude; Lois Lane; Radion (intro, villain); Professor Pepperwinkle; The J'ai (intro, villains, aliens) |
| Genre | superhero |
| Script | Gerry Conway |
| Pencils | Jose Luis Garcia-Lopez |
| Inks | Frank Springer |
| Notes | GS: Supergirl; V: Protector, Radion (I), the J'ai (I; aliens) |