Comic Title: Justice League of America #86
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: December 1970
On Sale Date: October 27, 1970 Newsstand Date October 27, 1970
Source: House Ad, Superman #232, Page 48

Copyright Date October 27, 1970
Source: Library of Congress, Periodicals 1970

Frequency: Monthly, (with the exception of Jan., Apr., July, and Oct. (semi-monthly, Nov.)
Cover Price: $0.15
Page Count: 32
Editor: Julius Schwartz

Title: "Earth's Final Hour"
Pages: 22

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

Writer: Mike Friedrich
Penciller: Dick Dillin
Inker: Joe Giella

Reprinted In:
Super Heroes #11 (1981)
Showcase Presents:Justice League of America Vol. 5 TPB (2011)
Justice League of America Archives Vol. 10 HC (2012)
Justice League of America:The Bronze Age Omnibus Vol. 1 HC (2017)
Justice League of America:The Last Survivors of Earth TPB (2019)

Feature Character(s)

• Justice League of America (last appearance in Justice League of America #84; next appearance in Aquaman #55)
• Superman (last appearance in Action Comics #394; next appearance in Action Comics #395)
• Batman (last appearance in Brave & the Bold #93; next appearance in Detective Comics #406)
• Flash (last appearance in Flash #202; next appearance in Aquaman #55)
• Aquaman (last appearance in Aquaman #54; next appearance in Aquaman #55)
• Atom (last appearance in Justice League of America #84; next appearance in Aquaman #55)
• Hawkman (last appearance in Justice League of America #84; next appearance in Aquaman #55)

Villain(s)

• Theo Zappa (aka the Zapper; no further appearances)
• Pajna Darr (an alien from Kalyarna; no further appearances)

Guest Appearance(s)

• Mera (last appearance in Aquaman #53; next appearance in Aquaman #55)

Other Character(s)

• The inhabitants of Kalyarna (no further appearances)

Cameo Appearance(s)

• Green Lantern (mentioned as being on personal search for America)
• Green Arrow (mentioned as being on personal search for America)

Synopsis:
Theo Zappa, the corrupt head of a giant corporation, gains control of a re-memory machine which allows him to reprogram the minds of others.

When Panja Darr, an alien from a world where magic is the norm, appears to him offering to buy Earth's supply of plankton to replace that of his own world, which has been decimated by magical pollution, Zappa uses the machine to steal Darr's powerful magic wand. He then absconds with all Earth's plankton and attempts to blackmail both planets.

Aware that this will eventually destroy Earth's food supply and end all life on the planet, the Justice League goes into action, with Superman and Aquaman attacking Zappa beneath the sea, Flash and Hawkman fighting him in space, and Batman and Atom finally following him to Panja Darr's world with the alien's ship. There he is beaten and his scheme thwarted, but the pollution problems of both planets remain unsolved.