Comic Title: Detective Comics #273
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: November 1959
On Sale Date: September 24, 1959 Copyright Date September 24, 1959
Source: Library of Congress, Periodicals 1959

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

Title: "The Unmasking 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 #272; next appearance in Detective Comics #274)

Supporting Character(s)

• Captain Harding (last appearance in Detective Comics #272; next appearance in Detective Comics #274)

Villain(s)

• B’rett (a martian criminal; no further appearances)

Comments:
Martian Manhunter’s existance is revealed to the world. He also loses his ability to use his powers while invisible.

Synopsis:
A rocket from Mars lands on Earth. A criminal martian named B’rett is inside. He begins using his powers to steal and terrorize humans. Detective John Jones is alerted to the trouble and investigates. Jones, in his Martian Manhunter guise, confronts the other alien. B’rett uses a Formula Z6 pellet on J’onn which removes his ability to use martian powers while invisible.

J’onn again confronts the alien, this time he allows the Earth people to see him. While they are startled at first, they realize he is trying to capture the criminal. J’onn weakens his opponent with some burning leaves. He is then able to send B’rett back to Mars. J’onn is welcomed by the thankful Earthmen.