Action Comics #310 (DC, 1964 — Cover A)

DC Comics · Action Comics (1938-2011) · 26 pages · Published 1964-03-04

Leo Dorfman — Writer
Jack Schiff — Writer
Sheldon Moldoff — Penciller
Jim Mooney — Penciller
Curt Swan — Penciller
George Klein — Inker
Jim Mooney — Inker
Sheldon Moldoff — Inker
Sheldon Moldoff — Cover Artist
Curt Swan — Cover Artist

"SECRET OF KRYPTONITE SIX!" Jax-Ur convinces Superman release him from the Phantom Zone in order to save the people of Atlantis from a deadly plague. To do so, they will have to travel back to Krypton before its destruction! In "SUPERGIRL'S RIVAL PARENTS!" Supergirl finally manages to free her parents from the Survival Zone, where they have been trapped since the destruction of Argo City.