Comic Title: Green Lantern #30
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: July 1964
On Sale Date: May 28, 1964 Copyright Date May 28, 1964
Source: Library of Congress, Periodicals 1964

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

Title: "The Tunnel Through Time"
Pages: 13

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

Writer: John Broome
Penciller: Gil Kane
Inker: Sid Greene

Reprinted In:
Green Lantern Archives Vol. 5 HC (2005)
Showcase Presents Green Lantern Vol. 2 TPB (2007)
Green Lantern Omnibus Vol. 2 HC (2012)
Green Lantern:The Silver Age Omnibus Vol. 1 HC (2017)
Green Lantern:The Silver Age Vol. 3 TPB (2018)

Feature Character(s)

• Green Lantern (last appearance in Justice League of America #28; next appearance in Green Lantern #30)

Supporting Character(s)

• Tom Kalmaku (last appearance in Green Lantern #29; next appearance in Green Lantern #30)

Villain(s)

• A race of pterodactyls (no further appearances)

Other Character(s)

• Various citizens of Coast City (no further appearances)

Synopsis:
Near Coast City, a strange boiling lake has appeared. Investigators see dinosaurs near the lake and are attacked by a pterodactyl. More pterodactyls threaten the city.

On a distant planet a race of intelligent pterodactyls is responsible for the developments. They have altered a section of Earth with a time-reversal beam to bring back the pterodactyls. They endow the creatures with superior mentality in an attempt to make the pterodactyls of Earth a master race.

With the military unable to defeat the attackers, Green Lantern tries to stop them. The superior mental force of the pterodactyls cancel out the effect of Green Lantern’s power beam. Instead GL lures them back to the lake, where the time tunnel, which brought the creatures to the present, exists. They encounter a T-Rex which frightens the pterodactyls enough for Green Lantern to overpower the leader. With the leader out of commission, the other creatures collapse. GL returns through the tunnel but is unable to determine how they developed. The alien pterodactyls abandon their plans when Earth moves out of range.