Comic Title: Action Comics #323
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: April 1965
On Sale Date: February 25, 1965 Newsstand Date February 25, 1965
Source: House Ad, Superboy #120, Page 10

Copyright Date February 25, 1965
Source: Library of Congress, Periodicals 1965


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

Title: "The Kryptonian Killer"
Pages: 13

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

Writer: Leo Dorfman
Artist: Jim Mooney

Reprinted In:
Supergirl:The Silver Age Omnibus Vol. 2 HC (2018)

Feature Character(s)

• Supergirl (last appearance in Action Comics #322; next appearance in Superman #176)

Villain(s)

• The Sisterhood of Evil (last appearance in Action Comics #322; no further appearances)
• Queen Ravenne (last appearance in Action Comics #322; no further appearances)
• Ran-Kor, Tempra, and Lattora (last appearance in Action Comics #322; no further appearances)
• Lucrezia Borgia, Lady MacBeth, and Mata Hari (last appearance in Action Comics #322; no further appearances)
• Py-Ron (aka Evil Man; a Phantom Zone criminal; no further appearances)

Guest Appearance(s)

• Superman (last appearance in Action Comics #322; next appearance in Justice League of America #34)
• Legion of Super-Pets (last appearance in Adventure Comics #322; next appearance in Superman #176)
• Comet (last appearance in Action Comics #321; next appearance in Superman #176)
• Streaky (last appearance in Adventure Comics #322; next appearance in Superman #176)
• Krypto (last appearance in Adventure Comics #322; next appearance in Superman #176)
• Super-Monkey (last appearance in Action Comics #318; next appearance in Superman #176)

Other Character(s)

• Circe (last appearance in Action Comics #311; next appearance in Action Comics #331)

Cameo Appearance(s)

• Lex Luthor (as an image)
• Brainiac (as an image)

Comments:
This story is continued from the second story of Action Comics #322.

Synopsis:
Trapped on Feminax by the Sisterhood of Evil, Supergirl is hypnotized by three of history's worst villainesses. Then she is sent back to Earth to commit deeds of evil. Supergirl steals secret defense plans from the United Nations, then develops a Kryptonite poison capable of killing super-beings.

Supergirl tests the poison on Comet, apparently killing him. Next she tests it on Phantom Zone prisoner Py-Ron. After the criminal dies, she uses the poison on Superman. Then the female criminals order Supergirl herself to drink the poison.

With Supergirl and Superman apparently dead, the women of Feminax celebrate. However, the heroes soon recover. Comet explains that he is not affected by Kryptonite and used telepathy to learn of Supergirl's predicament. He contacted Circe and developed an antidote to the poison.

Py-Ron also recovers from the poison. He flies to Feminax and takes revenge by destroying their world. Superman and Supergirl return him to the Phantom Zone for his destructive acts.