Comic Title: Detective Comics #23
Publisher: DC (Detective Comics, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: January 1939
Approx. On Sale Date: December 20, 1938 Copyright Date December 5, 1938
Source: Library of Congress, Periodicals 1939
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: 64
Contains: Ownership Statement
Editor: Vincent A. Sullivan

Title: (In Two Billion A.D.)
Pages: 13

Feature(s):
Slam Bradley (of Earth-1)

Writer: Jerry Siegel
Artist: Joe Shuster

Feature Character(s)

• Slam Bradley (last appearance in Detective Comics #22; next appearance in Detective Comics #24)

Supporting Character(s)

• Shorty Morgan (last appearance in Detective Comics #22; next appearance in Detective Comics #24)

Villain(s)

• Three fugitives from the future (including a plant man and a bird man; next appearance in Detective Comics #24)

Other Character(s)

• Professor Kenton (inventor of a time machine; next appearance in Detective Comics #24)
• Several future law enforcement officers (no further appearances)

Comments:
This story was not originally titled.

This story continues in the ninth story of Detective Comics #24.

Synopsis:
Slam and Shorty are rescued from a street fight by Professor Kenton. The Professor explains that his timely arrival was possible with the help of a time machine. The detectives then join Kenton on a trip to two billion A.D.

When they arrive Slam and Shorty are taken prisoner by a bird carrying a net. They are brought before three future men, who want Slam to help them escape the authorities. Slam won't help them, so one of the crooks attempts to kill Shorty. Slam is then captured by law enforcement agents from the future. Shorty is also taken into custody as they try to get him medical attention before he really does die.