Comic Title: Action Comics #315
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: August 1964
On Sale Date: June 25, 1964 Copyright Date June 25, 1964
Source: Library of Congress, Periodicals 1964

Newsstand Date June 25, 1964
Source: Newsdealer Magazine, V19 #5

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

Notes:
This issue contains a half-page feature: "The Origin of Super-Horse".

Title: "The Menace of Supergirl's Mother"
Pages: 10

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

Writer: Leo Dorfman
Artist: Jim Mooney

Reprinted In:
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 #314; next appearance in Action Comics #316)

Supporting Character(s)

• Fred Danvers (last appearance in Action Comics #314; next appearance in Action Comics #316)
• Edna Danvers (last appearance in Action Comics #314; next appearance in Action Comics #316)
• Zor-El (last appearance in Action Comics #314; next appearance in Action Comics #316)
• Allura (last appearance in Action Comics #314; next appearance in Action Comics #316)

Other Character(s)

• Dar-Lin (last appearance in Action Comics #314; no further appearances)
• Zan-Tor and Rena (Dar-Lin's parents; no further appearances)
• Supergirl Emergency Squad (last appearance in Action Comics #314; no further appearances)

Comments:
This story is continued from the second story of Action Comics #314 and continues in the second story of Action Comics #316.

Synopsis:
Heartbroken over the loss of their daughter, the Danvers try to move on with their new adopted daughter Dar-Lin inside Kandor. However, Dar-Lin's parents are suddenly found, leaving them alone again.

When Edna Danvers is stung by a Srang, it causes her to have an uncontrollable hatred for Zor-El and Allura. She disguises herself as a Kandorian named Bira and lures Supergirl's parents into a Kryptonite trap. Supergirl rescues her parents and gets Edna medical treatment in Kandor. However, Kara still suffers from having two sets of parents who want her.