Comic Title: Detective Comics #305
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: July 1962
On Sale Date: May 24, 1962 Newsstand Date May 24, 1962
Source: House Ad, Rip Hunter... Time Master #9, Page 30

Copyright Date May 24, 1962
Source: Library of Congress, Periodicals 1962

Newsstand Date May 24, 1962
Source: Newsdealer Magazine, V17 #3

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

Title: "J'onn J'onzz Vs. Futureman"
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 #12; next appearance in Justice League of America #13)

Villain(s)

• B’enn B’urnzz (a Martian criminal from the future; no further appearances)
• A gang of crooks (no further appearances)

Other Character(s)

• Futureman (a lawman from the future; no further appearances)

Synopsis:
J’onn is hunted by a man in a strange uniform and carrying an advanced weapon. The man, Futureman, is a lawman from the future who has mistaken J’onn for a criminal Martian from his own time, B’enn B’urnzz. B’enn has fled into the past and teamed with a criminal gang of Earthlings. After a brief battle, J’onn and Futureman team-up using fire to stop B’enn. Futureman takes the fugitive into custody and returns to his own time.