Comic Title: Detective Comics #345
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: November 1965
On Sale Date: September 30, 1965 Copyright Date September 30, 1965
Source: Library of Congress, Periodicals 1965

Frequency: Monthly
Cover Price: $0.12
Page Count: 32
Editor: Julius Schwartz

Title: "The Blockbuster Invasion of Gotham City"
Pages: 14

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

Writer: Gardner F. Fox
Penciller: Carmine Infantino
Inker: Joe Giella

Reprinted In:
Batman #261 (1975)
Greatest Batman Stories Ever Told HC (1988)
Greatest Batman Stories Ever Told TPB (1989)
Showcase Presents:Batman Vol. 2 TPB (2007)
Tales of the Batman:Carmine Infantino HC (2014)

Feature Character(s)

• Batman (last appearance in Justice League of America #40; next appearance in Showcase #59)

Supporting Character(s)

• Robin (last appearance in Batman #175; next appearance in Showcase #59)
• Commissioner Gordon (last appearance in Batman #175; next appearance in Batman #177)

Villain(s)

• Blockbuster (Mark Desmond; next appearance in Detective Comics #349)
• Roland Desmond (Mark's brother; no further appearances)

Synopsis:
Bruce Wayne takes refuge from a storm on a small island. He rescues a young boy, Mark Desmond, who has become trapped in quicksand. After the storm, Bruce leaves Mark with his brother Roland.

Later in Gotham City, a giant behemoth which Robin calls Blockbuster begins a robbery spree. Blockbuster is impervious to physical harm and possesses tremendous strength. Batman is unable to apprehend the brute, who seems to possess little intelligence.

During one robbery, Batman follows Blockbuster back to the island where he met Mark Desmond. Noticing a similarity, Batman realizes that Blockbuster is Mark. By removing his costume, he tames Mark who recognizes Bruce Wayne as his friend. Robin apprehends Roland who then explains that Mark was the victim of an experiment to increase his size. Roland ordered him to commit the robberies.

Batman returns Roland to the mainland for incarceration. When he returns to the island however, Blockbuster has disappeared.