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The Killing Joke
Prime Earth (Earth-0)•7 issues
Ended
Mini-Series Arc
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A 1988 DC graphic novel by Alan Moore and Brian Bolland. The Joker escapes Arkham Asylum and targets Commissioner Gordon, attempting to drive him to madness. The story weaves an origin flashback with the Joker's assault on the Gordon family.
The main DC Comics universe following the Flashpoint event and New 52 relaunch in 2011. Prime Earth (Earth-0) serves as home to the primary versions of Superman, Batman, Wonder Woman, and the Justice League. The continuity has evolved through DC Rebirth (2016) and subsequent publishing eras while maintaining its core designation.