Comic Title: Detective Comics #236
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: October 1956
Approx. On Sale Date: August 23, 1956 Copyright Date August 21, 1956
Source: Library of Congress, Periodicals 1956
Until 1958 DC did not report actual on sale dates to the copyright office
The publication dates listed in LoC records are NOT release dates.

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

Title: "The Great Earth-Mars Mystery"
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 #235; next appearance in Detective Comics #237)

Supporting Character(s)

• Captain Harding (last appearance in Detective Comics #235; next appearance in Detective Comics #237)

Villain(s)

• A gang of Martian canal raiders (no further appearances)
• A harbor thief (no further appearances)

Other Character(s)

• J'onn's mother and father (no further appearances)

Synopsis:
After failing to capture a criminal who disappears underwater, John Jones returns home to work on contacting Mars. He finally achieves communication, be briefly contacting his parents. They tell him about some criminals on Mars using similar tactics of escape. J'onn solves both crimes by deducing the crooks are attaching themselves to the underside of boats in the harbor. As detective Jones, J'onn proves his theory correct and captures the Earth criminal.