Comic Title: World's Finest Comics #149
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: May 1965
On Sale Date: March 11, 1965 Newsstand Date March 11, 1965
Source: House Ad, Action Comics #323, Page 14

Copyright Date March 11, 1965
Source: Library of Congress, Periodicals 1965

Frequency: Monthly, with the exception of Jan., April, July and Oct.
Cover Price: $0.12
Page Count: 32
Editor: Mort Weisinger

Title: "The Game of Secret Identities"
Pages: 17

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

Writer: Edmond Hamilton
Penciller: Curt Swan
Inker: Sheldon Moldoff

Reprinted In:
Showcase Presents:World's Finest Vol. 3 TPB (2010)
Batman & Superman in World's Finest Comics:The Silver Age Omnibus Vol. 2 HC (2019)

Feature Character(s)

• Superman (last appearance in Superman's Pal, Jimmy Olsen #84; next appearance in Superman #177)
• Batman (last appearance in Justice League of America #35; next appearance in Detective Comics #339)

Supporting Character(s)

• Robin (last appearance in Batman #171; next appearance in Detective Comics #339)

Other Character(s)

• Mr. Skeggs (a philanthropist; no further appearances)
• Three men suspected of being Superman (no further appearances)
• A telepathic bloodhound (no further appearances)

Cameo Appearance(s)

• Composite Superman (in a film)

Comments:
Part 2: "The Super-Detective"

Synopsis:
Superman is worried that someone may discover his secret identity. He asks Batman to test his secret. Superman uses a machine to remove the knowledge of his secret from Batman's mind. Then Batman goes to work to uncover Superman's secret. Using brainwave patterns Batman soon discovers that Superman is Clark Kent.

Superman feels badly that he allowed his secret to be discovered. He issues the same challenge to Batman, promising to prohibit himself from using his super-senses. Superman then uses the amnesia device to remove the knowledge of Batman's secret identity from his mind.

Superman's efforts to discover Batman's secret are continually thwarted. The Man of Steel soon becomes obsessed with solving the mystery. Batman finally allows Superman to learn his secret, because he began to worry that Superman was neglecting his duties in order to solve the puzzle. Though Superman is the World's Mightiest Mortal, Batman proves that Superman is not the World's Greatest Detective.