Comic Title: Green Lantern #51
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: March 1967
On Sale Date: January 12, 1967 Newsstand Date January 12, 1967
Source: Direct Currents, Action Comics #346, Page 16

Copyright Date January 12, 1967
Source: Library of Congress, Periodicals 1967

Frequency: Monthly, with the exception of Feb., May, Aug., and Nov.
Cover Price: $0.12
Page Count: 32
Editor: Julius Schwartz

Title: "Green Lantern's Evil Alter Ego"
Pages: 23

Feature(s):
Green Lantern (Hal Jordan of Earth-1)

Writer: John Broome
Artist: Gil Kane

Reprinted In:
Showcase Presents Green Lantern Vol. 3 TPB (2008)
Green Lantern Archives Vol. 7 HC (2012)
Green Lantern:The Silver Age Omnibus Vol. 2 HC (2018)

Feature Character(s)

• Green Lantern (last appearance in Justice League of America #51; next appearance in Flash #168)

Supporting Character(s)

• Guardians of the Universe (last appearance in Green Lantern #52; next appearance in Flash #168)
• Chairman Dasor (last appearance in Green Lantern #47; next appearance in Green Lantern #66)
• Iona Vane (last appearance in Green Lantern #47; next appearance in Green Lantern #66)

Villain(s)

• Pol Manning (aka Dr. Strangehate; no further appearances)
• Manning's Neomen (no further appearances)

Other Character(s)

• The high council and Citizens of 58th century Star City (Gomi Darr named; last appearance in Green Lantern #47; next appearance in Green Lantern #66)

Synopsis:
Green Lantern finally gets around to investigating odd objects he has found stuck to his uniform at various times. His power ring reveals the objects originated in the 58th century. Seeking to learn the truth GL uses his ring to travel into the future where he is reunited with Chairman Dasor and Iona Vane. His arrival is timely since a criminal called Dr. Strangehate is trying to overthrow the Solar Council. GL defeats the crook.

After the battle Iona and Dasor restore GL's memories of his previous trips into the future. Dr. Strangehate was created as a side-effect of these travels and the power ring. He is really Pol Manning, a fictitious identity created for GL, while he was in the 58th century. Manning summons a Neoman created into an evolutionary experiment to free him and kidnap Iona.

Green Lantern tracks down Manning, who has created an army of Neomen. Green Lantern stops them and ends Manning's experiments. Since Manning's creation was partly his own responsibility, GL ensures that he is reformed and the evil is removed from his personality. GL then returns to his own time, retaining the knowledge of his life in the future.