Comic Title: Batman #138
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: March 1961
On Sale Date: January 12, 1961 Copyright Date January 12, 1961
Source: Library of Congress, Periodicals 1961

Frequency: Monthly, with the exception of January, May, July, and November
Cover Price: $0.10
Page Count: 32
Editor: Jack Schiff

Title: "The Secret of the Sea Beast"
Pages: 9

Feature(s):
Batman (of Earth-1)

Writer: Bill Finger
Penciller: Sheldon Moldoff
Inker: Charles Paris

Feature Character(s)

• Batman (last appearance in Batman #138; next appearance in World's Finest Comics #116)

Supporting Character(s)

• Robin (last appearance in Batman #138; next appearance in World's Finest Comics #116)
• Commissioner Gordon (last appearance in Detective Comics #287; next appearance in World's Finest Comics #116)

Villain(s)

• Chips Hassel and his gang (no further appearances)
• Lester Guinn, Hal Torson, and their henchmen (no further appearances)

Synopsis:
A mysterious sea beast has attacked ships and two passengers have disappeared, Lester Guinn and Hal Torson. Batman investigates the creature, but another case comes up. The Dynamic Duo tracks down an escaped crook named Chips Hassel and takes him into custody.

Batman then disguises himself as Hassel and walks along the pier. The sea beast attacks again and Batman is taken inside. He learns that it is a submarine controlled by Torson and Guinn who are wanted swindlers. Batman alerts Robin who trails the gang to the sub’s hangar. He and Batman are able to round up the crooks and tow the sea monster submarine back home.