Comic Title: Action Comics #285
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: February 1962
On Sale Date: December 28, 1961 Newsstand Date December 28, 1961
Source: House Ad, Superman #151, Page 21

Copyright Date December 28, 1961
Source: Library of Congress, Periodicals 1962

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

Title: "The World's Greatest Heroine"
Pages: 24

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

Writer: Jerry Siegel
Artist: Jim Mooney

Reprinted In:
Action Comics #360 (1968)
Best of DC #17 (1981)
Supergirl Archives Vol. 2 HC (2004)
Showcase Presents Superman Vol. 3 TPB (2007)
Showcase Presents Supergirl Vol. 2 TPB (2009)
Supergirl:The Silver Age Omnibus Vol. 1 HC (2016)
Action Comics 80 Years of Superman:The Deluxe Edition HC (2018)
Supergirl:The Silver Age Vol. 2 TPB (2018)

Feature Character(s)

• Supergirl (last appearance in Action Comics #284; next appearance in Action Comics #286)
• Superman (last appearance in Superman's Girl Friend, Lois Lane #31; next appearance in Adventure Comics #293)

Supporting Character(s)

• Fred Danvers (last appearance in Action Comics #284; next appearance in Action Comics #286)
• Edna Danvers (last appearance in Action Comics #284; next appearance in Action Comics #286)
• Jerro (last appearance in Action Comics #284; next appearance in Action Comics #286)
• Dick Malverne (last appearance in Action Comics #283; next appearance in Action Comics #286)
• Lori Lemaris (last appearance in Superman's Girl Friend, Lois Lane #31; next appearance in Action Comics #286)
• Miss Hart (called Mrs. Hart; last appearance in Action Comics #279; next appearance in Action Comics #299)

Villain(s)

• The Infinite Monster (no further appearances)

Guest Appearance(s)

• Legion of Super-Heroes (last appearance in Adventure Comics #290; next appearance in Adventure Comics #293)
• Cosmic Boy (last appearance in Adventure Comics #290; next appearance in Adventure Comics #293)
• Saturn Girl (last appearance in Adventure Comics #290; next appearance in Adventure Comics #293)
• Lightning Lad (last appearance in Adventure Comics #290; next appearance in Adventure Comics #293)
• Brainiac 5 (last appearance in Adventure Comics #323; next appearance in Superman #152)

Other Character(s)

• Lenora Lemaris (last appearance in Action Comics #284; no further appearances)
• President John F. Kennedy (next appearance in Action Comics #309)
• Jackie Kennedy (no further appearances)
• Professor Hartz and Karl (a scientist and his assistant; no further appearances)

Cameo Appearance(s)

• Zor-El (in flashback to Supergirl’s origin)
• Allura (in flashback to Supergirl’s origin)

Comments:
Part. 2: "The Infinite Monster"

Supergirl’s existance is revealed to the world.

Synopsis:
Superman decides it is time to announce Supergirl to the world. First they tell Linda’s parents that their adopted daughter is Supergirl, then the big announcement is made. The world celebrates and honors the young hero.

Superman has to leave Earth, so when a monster threatens the world, Supergirl is called in to help. At first she has trouble, causing the people to wish Superman was around. She perseveres and defeats the monster with help from Brainiac 5. Then Superman returns and gives Supergirl her own wing in the Fortress of Solitude.