Comic Title: Detective Comics #306
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: August 1962
On Sale Date: June 26, 1962 Copyright Date June 26, 1962
Source: Library of Congress, Periodicals 1962

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

Title: "The Last Days of J'onn J'onzz"
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 #13; next appearance in Justice League of America #14)

Supporting Character(s)

• Captain Harding (last appearance in Detective Comics #304; next appearance in Detective Comics #307)
• Diane Meade (last appearance in Detective Comics #304; next appearance in Detective Comics #307)

Villain(s)

• A gang of unnamed crooks (no further appearances)

Synopsis:
The Martian Manhunter confronts a gang of crooks using oversized robotic animals to assist them in their thefts. J’onn stops the first robbery, but suddenly finds himself weakened.

In his John Jones guise he remains healthy, but when he assumes his martian identity, J’onn becomes incredibly weak. The cause is a strange meteorite outside of town. J’onn is unable to destroy it, and the effect is becoming worse.

Realizing J’onn is too weak to stop them, the remaining criminals attack the city. J’onn comes to the rescue, having regained his strength. Fortunately, the meteorite burned itself out, and it's effect on J’onn ended. Back at full strength, J’onn defeats the crooks.