Comic Title: Detective Comics #309
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: November 1962
On Sale Date: September 27, 1962 Copyright Date September 27, 1962
Source: Library of Congress, Periodicals 1962

Frequency: Monthly
Cover Price: $0.12
Page Count: 32
Editor: Jack Schiff

Title: "The Man Who Saved Earth"
Pages: 12

Feature(s):
Martian Manhunter (of Earth-1)

Artist: Joe Certa

Reprinted In:
Showcase Presents:Martian Manhunter Vol. 2 TPB (2009)

Feature Character(s)

• Martian Manhunter (last appearance in Justice League of America #15; next appearance in Detective Comics #310)

Supporting Character(s)

• Captain Harding (last appearance in Detective Comics #308; next appearance in Detective Comics #310)
• Diane Meade (last appearance in Detective Comics #308; next appearance in Detective Comics #310)

Villain(s)

• Ryx and his followers (alien conquerors; no further appearances)

Other Character(s)

• Horace Reeves (a recluse; no further appearances)
• Tyl and his men (aliens; no further appearances)

Synopsis:
A group of aliens, led by Ryx, have captured recluse Horace Reeves and patrolwoman Diane Meade. They plan to take the humans back to their planet as proof of Earth’s inferiority. J’onn J’onzz replaces Reeves and is taken to the alien homeworld. There, he demonstrates his martian powers, convincing the aliens that Earth is too powerful to conquer. Then he squashes an alien rebellion before returning to Earth. The aliens still believe that Reeves is the Martian Manhunter and award the recluse with a plaque in his honor.