Comic Title: Detective Comics #278
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: April 1960
On Sale Date: March 1, 1960 Copyright Date March 1, 1960
Source: Library of Congress, Periodicals 1960

Frequency: Monthly
Cover Price: $0.10
Page Count: 32
Editor: Jack Schiff

Title: "The Defeat of J'onn J'onzz"
Pages: 6

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

Artist: Joe Certa

Reprinted In:
Showcase Presents:Martian Manhunter Vol. 1 TPB (2007)

Feature Character(s)

• Martian Manhunter (last appearance in Detective Comics #277; next appearance in Brave and the Bold #29)

Supporting Character(s)

• Captain Harding (last appearance in Detective Comics #277; next appearance in Detective Comics #279)

Villain(s)

• The Rocky Carlin Gang (no further appearances)

Other Character(s)

• Several police disguised as Venusians (no further appearances)

Synopsis:
A spaceship full of venusians lands on Earth. The venusians are seeking uranium for their fuel tanks. The police try to stop the aliens but their guns are melted. Martian Manhunter arrives on the scene, but the alien weapons overpower him too.

Rocky Carlin hears about the alien encounters and realizes the weapons would be useful. His gang recently stole some torberite which is uranium based. He contacts the aliens and leads them back to his hide-out.

The aliens are really police in disguise. The entire encounter was designed to flush out Rocky’s gang. The Manhunter and the police finally capture Rocky and his gang.