Comic Title: Detective Comics #287
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: January 1961
On Sale Date: November 25, 1960 Copyright Date November 25, 1960
Source: Library of Congress, Periodicals 1960

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

Title: "J'onn J'onzz's Kid Brother"
Pages: 7

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 Justice League of America #2; next appearance in Justice League of America #3)

Supporting Character(s)

• Captain Harding (last appearance in Detective Comics #286; next appearance in Detective Comics #288)

Villain(s)

• Biff Conklin (a sniper; no further appearances)

Other Character(s)

• T’omm (J’onn’s brother; next appearance in Detective Comics #301)
• J’onn’s unnamed parents (next appearance in Detective Comics #301)

Flashback Appearance(s)

• Martian Manhunter (last appearance in Detective Comics #243; next appearance in Detective Comics #225)

Cameo Appearance(s)

• Dr. Mark Erdel (in flashback to J’onn’s arrival on Earth)

Comments:
The origin of J’onn J’onzz is recapped in this story.

Synopsis:
While on vacation from the police force, J’onn repairs Dr. Erdel’s teleportation machine enough to make a single transport to and from Mars. An accident however causes him to teleport T’omm, his younger brother, to Earth. T’omm stays long enough to help J’onn protect his secret identity, then returns to Mars. The machine is exhausted, leaving J’onn to remain on Earth.