Comic Title: Justice League of America #55
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: August 1967
On Sale Date: June 13, 1967 Newsstand Date June 13, 1967
Source: Direct Currents, Batman #194, Page 30

Newsstand Date June 13, 1967
Source: Newsdealer Magazine, V22 #4

Copyright Date June 13, 1967
Source: Library of Congress, Periodicals 1967

Frequency: Monthly, with the exception of Jan., Apr., July & Oct.; (semi-monthly, Nov.)
Cover Price: $0.12
Page Count: 32
Editor: Julius Schwartz

Title: "The Super-Crisis That Struck Earth-Two"
Pages: 23

Feature(s):
Justice League of America (of Earth-1)

Writer: Gardner F. Fox
Penciller: Mike Sekowsky
Inker: Sid Greene

Reprinted In:
Justice League of America Archives Vol. 7 HC (2001)
Crisis on Multiple Earths Vol. 2 TPB (2003)
Showcase Presents:Justice League of America Vol. 3 TPB (2008)
Robin, the Boy Wonder:A Celebration of 75 Years HC (2015)
Justice League of America:The Silver Age Omnibus Vol. 2 HC (2016)
Crisis on Infinite Earths Box Set HC (2020)
Crisis on Multiple Earths:Crossing Over TPB (2021)

Feature Character(s)

• Justice League of America (last appearance in Justice League of America #54; next appearance in Justice League of America #56)
• Superman (of Earth-1; last appearance in Action Comics #352; next appearance in Justice League of America #56)
• Green Lantern (of Earth-1; last appearance in Green Lantern #54; next appearance in Justice League of America #56)
• Flash (of Earth-1; last appearance in Flash #172; next appearance in Justice League of America #56)
• Green Arrow (of Earth-1; last appearance in Action Comics #350; next appearance in Justice League of America #56)

Guest Star(s)

• Justice Society of America (last appearance in Justice League of America #47; next appearance in Justice League of America #56)
• Hawkman (of Earth-2; last appearance in Justice League of America #38; next appearance in Justice League of America #56)
• Hourman (last appearance in Showcase #56; next appearance in Justice League of America #56)
• Wonder Woman (of Earth-2; last appearance in Flash #137; next appearance in Justice League of America #56)
• Wildcat (last appearance in Justice League of America #47; next appearance in Justice League of America #56)
• Mr. Terrific (last appearance in Justice League of America #38; next appearance in Justice League of America #56)
• Robin (of Earth-2; last appearance in Superman Family #216; next appearance in Justice League of America #56)
• Johnny Thunder (last appearance in Justice League of America #38; next appearance in Justice League of America #56)

Villain(s)

• The Black Spheres (life-forms from another universe; next appearance in Justice League of America #56)
• How Chu (a Chinese bandit; next appearance in Justice League of America #56)
• Gem Girl (Claire Morton; a stenographer; next appearance in Justice League of America #56)
• Money Master (Horace Rowland; a business magnate; next appearance in Justice League of America #56)
• The Smashing Sportsman (Martin Baxter; an ex-baseball player; next appearance in Justice League of America #56)
• Four unnamed inhabitants of Earth-1 (affected by the Black Spheres; behind-the-scenes; next appearance in Justice League of America #56)

Guest Appearance(s)

• Thunderbolt (last appearance in Justice League of America #38; next appearance in Justice League of America #56)

Comments:
This story continues in Justice League of America #56.

Synopsis:
Four black spheres, life-forms from another universe, are absorbed into the bodies of four humans of Earth-2, granting them super-powers but also turning them evil. United to battle them are the members of the Justice Society, including new member Robin, now an adult crimefighter.

He and Wildcat team up against Martin Baxter, an embittered former ballplayer intent on destroying sports arenas, Wonder Woman battles Claire Morton, a stenographer with a love for gems, Hawkman and Mr. Terrific battle Horace Rowland, businessman-turned-criminal, and Hourman fights Chinese bandit How Chu.

When the JSA is defeated, late arrival Johnny Thunder sends his magic Thunderbolt after the villains, but he too meets defeat. Johnny then summons members of the Justice League of Earth-1 for aid, only to find them engaged in a similar case with no results.