Comic Title: Justice League of America #28
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: June 1964
On Sale Date: April 30, 1964 Newsstand Date April 30, 1964
Source: House Ad, Flash #145, Page 30

Newsstand Date April 30, 1964
Source: Newsdealer Magazine, V19 #4

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

Frequency: Monthly, with the exception of Jan., April, July and Oct.Monthly, with the exception of Jan., April, July and Oct.
Cover Price: $0.12
Page Count: 32
Editor: Julius Schwartz

Title: "The Case of the Forbidden Super-Powers"
Pages: 25

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

Writer: Gardner F. Fox
Penciller: Mike Sekowsky
Inker: Bernard Sachs

Reprinted In:
Justice League of America Archives Vol. 4 HC (1998)
Showcase Presents:Justice League of America Vol. 2 TPB (2007)
Justice League of America Omnibus Vol. 1 HC (2014)
Justice League of America:The Silver Age Vol. 3 TPB (2017)

Feature Character(s)

• Justice League of America (last appearance in Green Lantern #29; next appearance in Action Comics #314)
• Superman (last appearance in Action Comics #313; next appearance in World's Finest Comics #142)
• Batman (last appearance in Detective Comics #328; next appearance in World's Finest Comics #142)
• Flash (last appearance in Brave and the Bold #54; next appearance in Action Comics #314)
• Wonder Woman (last appearance in Green Lantern #29; next appearance in Wonder Woman #147)
• Green Lantern (last appearance in Green Lantern #29; next appearance in Green Lantern #30)
• Aquaman (last appearance in Brave and the Bold #54; next appearance in Aquaman #16)
• Green Arrow (last appearance in Justice League of America #27; next appearance in Action Comics #314)
• Atom (last appearance in Green Lantern #29; next appearance in Action Comics #314)

Supporting Character(s)

• Snapper Carr (last appearance in Green Lantern #29; next appearance in Justice League of America #29)

Villain(s)

• Headmaster Mind (a criminal professor; next appearance in Teen Titans #19)
• Matter Master (last appearance in Brave and the Bold #35; next appearance in Hawkman #9)
• Tattooed Man (last appearance in Green Lantern #23; next appearance in Justice League of America #61)
• Top (last appearance in Flash #141; next appearance in Flash #155)

Guest Appearance(s)

• Carol Ferris (last appearance in Green Lantern #29; next appearance in Green Lantern #32)

Other Character(s)

• Unnamed millionaires, gold miners, policemen, and United Nations representatives (no further appearances)

Comments:
Batman's costume chest emblem changes as of this issue.

The Justice League helps Superman discover his possible alternate origins in the first story of Action Comics #314 following this story.

Synopsis:
Headmaster Mind creates cardial batteries powered by the heart action of super-heroes, and uses them to create disasters which occur whenever a super-powered member of the League uses his abilities. The heroes are forbidden to use their powers by order of the United Nations, and stage a protest against this injunction at the U.N. Plaza.

Meanwhile, non-powered members Batman and Green Arrow are helpless against the villain's criminal "students," the Top, Tattooed Man, and Matter Master. Encouraged by the Caped Crusader and the Ace Archer, the other members strike out after the villains without using their powers. By sheer wit and courage, Atom and Superman capture the Matter Master, Aquaman and Wonder Woman subdue the Top, and Green Lantern and Flash overcome the Tattooed Man.

At the same time, Batman and Green Arrow track down Headmaster Mind and deactivate his machines, and the Justice League is reinstated at a special meeting of the United Nations.