Mark Desmond was a chemist who had wanted to become stronger, having been scrawny as a youngster. Experimenting on himself, he created a serum that made him grow stronger and taller, but in the process was turned into a mindless brute; an additional side-effect of the serum was that it took away his power of speech. Desmond was cared for by his criminally-minded brother, Roland, who shielded Mark's monstrous appearance from their mother.
Roland used Mark to commit crimes until they were stopped by Batman and Robin. Desmond had years earlier been rescued from drowning in quicksands by Bruce Wayne, who had arrived on the brothers' island home after his yacht had been wrecked during a storm at sea. The Dark Knight Detective discovered that he could calm and stall the behemoth by removing his cowl and revealing his face. The sight did indeed calm the giant, preventing further destruction. Blockbuster sought solitude when free, only to find himself opposing the Caped Crusader on various occasions. He served as a member of the Secret Society of Super Villains during a battle with the Justice League.
Amanda Waller recruits Blockbuster to the Suicide Squad under Task Force X. The other members are criminals forced to wear explosive bracelets, but Blockbuster became a member for other reasons. They were sent to destroy Brimstone, who was attacking Mount Rushmore. Brimstone murdered Blockbuster by burning him to death. This distracted Brimstone long enough for Deadshot to deliver the killshot.
- Although this character was originally introduced during DC's Earth-One era of publication, their existence following the events of the 1985-86 limited series Crisis on Infinite Earths remains intact. However, some elements of the character's Pre-Crisis history may have been altered or removed for Post-Crisis New Earth continuity, and should be considered apocryphal.
- Mark Desmond is unable to speak while he is under the effects of his blockbuster serum.
- 36 Appearances of Mark Desmond (New Earth)
- 13 Images featuring Mark Desmond (New Earth)
- Quotations by or about Mark Desmond (New Earth)
- Character Gallery: Mark Desmond (New Earth)
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This character, team or organization, is or was primarily an enemy of the Batman, or the Batman Family as a whole. This template will categorize articles that include it into the category "Batman Villains."