Comic Title: Action Comics #310
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: March 1964
On Sale Date: January 30, 1964 Newsstand Date January 30, 1964
Source: House Ad, Adventures of Jerry Lewis #81, Page 30

Newsstand Date January 30, 1964
Source: Newsdealer Magazine, V19 #1

Copyright Date January 30, 1964
Source: Library of Congress, Periodicals 1964

Frequency: Monthly
Cover Price: $0.12
Page Count: 32
Editor: Mort Weisinger

Title: "Supergirl's Rival Parents"
Pages: 13

Feature(s):
Supergirl (of Earth-1)

Writer: Leo Dorfman
Artist: Jim Mooney

Reprinted In:
Adventure Comics #416 (1972)
Showcase Presents Supergirl Vol. 2 TPB (2009)
Supergirl:The Silver Age Omnibus Vol. 2 HC (2018)

Feature Character(s)

• Supergirl (last appearance in Action Comics #310; next appearance in Action Comics #311)

Supporting Character(s)

• Fred Danvers (last appearance in Action Comics #309; next appearance in Action Comics #314)
• Edna Danvers (last appearance in Action Comics #309; next appearance in Action Comics #314)
• Zor-El (last appearance in Action Comics #309; next appearance in Action Comics #314)
• Allura (last appearance in Action Comics #309; next appearance in Action Comics #314)
• Comet (last appearance in Action Comics #309; next appearance in Action Comics #311)

Other Character(s)

• Various Kandorians (no further appearances)
• Android duplicates of Zor-El and Allura (Zor-El android destroyed in this story; no further appearances)

Cameo Appearance(s)

• Superman (in flashback to Action Comics #285)

Comments:
Zor-El and Allura are rescued from the Survival Zone.

Synopsis:
Supergirl develops a device enabling her to communicate with her Kryptonian parents in the Survival Zone. She then constructs a machine to free them. During the process, something goes wrong, but Fred Danvers uses his engineering skill to correct the problem. Zor-El and Allura then emerge safely from the Survival Zone.

On Earth, Zor-El and Allura gain super powers. They intend to take Kara with them and live in Superman's Fortress. When they see how unhappy the Danvers family is, the Kryptonian couple decides to live in Kandor, where Kara can visit when she likes. Now, the former orphan girl has two sets of parents.