Comic Title: Batman Annual #3
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Summer 1962
On Sale Date: June 19, 1962 Newsstand Date June 19, 1962
Source: House Ad, Challengers of the Unknown #27, Page 13

Copyright Date June 19, 1962
Source: Library of Congress, Pamphlets 1962

Cover Price: $0.25
Page Count: 80
Editor: Jack Schiff

See Also: The Guide to DC Giants

Title: "The Mental Giant of Gotham City"
Pages: 10

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

Writer: Edmond Hamilton
Penciller: Dick Sprang
Inker: Charles Paris

Reprinted From:
Detective Comics #217 (1955)

Feature Character(s)

• Batman (last appearance in Batman #90; next appearance in World's Finest Comics #75)

Supporting Character(s)

• Robin (last appearance in Batman #90; next appearance in World's Finest Comics #75)

Villain(s)

• The Metal Mob (a gang of thieves; no further appearances)

Other Character(s)

• Barney Barrow (a janitor; no further appearances)

Synopsis:
While cleaning a police laboratory, janitor Barney Barrow is exposed to radiation, causing his brain to grow. Barney becomes a mental giant and puts his brain to use in catching criminals. First he deduces Batman’s true identity; then he blackmails the Caped Crusader into working for him.

Batman initially goes along with Barney to catch the Metal Mob. However, Barney’s methods are extreme and dangerous, so Batman disobeys Barney. Fortunately the effects of the radiation wears off, restoring Barney to normal without recollection of Batman’s identity.