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.
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