Arkham Asylum is a fictional forensic psychiatric hospital appearing in American comic books published by DC Comics, commonly in stories featuring the superhero Batman. It first appeared in Batman #258, written by Dennis O'Neil with art by Irv Novick. Located in Gotham City, the asylum houses patients who are criminally insane, as well as select prisoners with unusual medical requirements that are beyond a conventional prison's ability to accommodate. Its high-profile patients are often members of Batman's rogues gallery.
The Scarecrow is a supervillain appearing in American comic books published by DC Comics. Created by writer Bill Finger and artist Bob Kane, the character first appeared in World's Finest Comics #3. The Scarecrow has become one of the superhero Batman's most enduring enemies belonging to the collective of adversaries that make up his rogues gallery.
Hugo Strange is a supervillain appearing in comic books published by DC Comics, commonly as an adversary of the superhero Batman. The character is one of Batman's first recurring villains, and was also one of the first to discover his secret identity. The character first appeared in Detective Comics #36.
The Mad Hatter is a supervillain appearing in comic books published by DC Comics, commonly as an adversary of the superhero Batman. He is modeled after the Hatter from Lewis Carroll's novel Alice's Adventures in Wonderland, a character often called the "Mad Hatter" in adaptations of Carroll. A scientist who invents and uses technological mind control devices to influence and manipulate the minds of his victims, the Mad Hatter is one of Batman's most enduring enemies and belongs to the collective of adversaries that make up Batman's rogues gallery.
Killer Croc is a supervillain appearing in American comic books published by DC Comics. Created by Gerry Conway, Don Newton and Gene Colan, the character was introduced in Batman #357. He has become one of the most enduring enemies of the superhero Batman and belongs to the collective of adversaries that make up his rogues gallery.
Victor Zsasz, also known as Mr. Zsasz or simply Zsasz, is a villain appearing in comic books published by DC Comics. The character first appeared in Batman: Shadow of the Bat #1. He is a sadomasochistic and psychopathic serial killer who carves a tally mark onto himself for each of his victims. A recurring adversary of the superhero Batman, Zsasz belongs to the collective of enemies that make up Batman's rogues gallery.
The Cluemaster is a supervillain appearing in American comic books published by DC Comics, commonly as an adversary of the superhero Batman as well as a recurring enemy of Tim Drake, the third Robin. Cluemaster first appeared in Detective Comics #351 and was created by Gardner Fox and Carmine Infantino.
Firefly is a supervillain appearing in American comic books published by DC Comics. Created by France Herron and Dick Sprang, he made his debut in Detective Comics #184. Initially portrayed as a criminal who utilized lighting effects to commit robberies, Firefly was later reimagined as a sociopathic pyromaniac with an obsessive compulsion to start fires following Crisis on Infinite Earths' reboot of the DC Universe in the 1980s. This darker depiction of the character has since endured as one of the superhero Batman's most recurring enemies and belongs to the collective of adversaries that make up his central rogues gallery.
Hush is a supervillain appearing in American comic books published by DC Comics. Created by Jeph Loeb and Jim Lee, the character first appeared in Batman #609 in January 2003 as part of the twelve-issue storyline Batman: Hush. Hush serves as a criminal foil to the superhero Batman, as an example of what Batman could have been had he used his intellect and wealth for malice, and belongs to the collective of adversaries that make up his rogues gallery.
Calendar Man is a supervillain appearing in American comic books published by DC Comics, as an enemy of the superhero Batman, belonging to the collective of adversaries that make up Batman's rogues gallery. Calendar Man is known for committing crimes that correspond with holidays and significant dates. He often wears costumes to correlate with the date of the designated crime. His name is a reference to the Julian and Gregorian calendars. In his debut, the character was presented as a joke villain, but in later years, writers developed Calendar Man as a dark, disturbed criminal who toys with Batman.
KGBeast is a supervillain appearing in comic books published by DC Comics. Created by Jim Starlin and Jim Aparo, the character first appeared as an adversary of Batman.
The Ten-Eyed Man is a fictional character in DC Comics. He first appeared in Batman #226 and was created by Frank Robbins and Irv Novick.
Professor Achilles Milo is a fictional character appearing in American comic books published by DC Comics.
Doctor Phosphorus is a supervillain who has appeared in various comic book series published by DC Comics. Primarily an enemy of Batman, the villain exists in DC's main shared universe, known as the DC Universe.
Hades is a fictional character appearing in DC Comics publications and related media, commonly as an adversary and sometimes-ally of the superhero Wonder Woman. Based upon the eponymous Greek mythological figure, he is the Olympian god of the dead and ruler of the underworld.
Magpie is a supervillain appearing in American comic books published by DC Comics. She was created by John Byrne, and first appeared in The Man of Steel #3.
Professor Pyg is a supervillain who appears in comic books published by DC Comics, commonly as an adversary of the superhero Batman. Pyg was created by Grant Morrison, Andy Kubert, and Frank Quitely and debuted as a corpse in the alternate reality story Batman #666 before being introduced as a recurring character in the mainstream DC Universe two years later in Batman and Robin #1. Professor Pyg was re-introduced following DC's The New 52 comics relaunch in 2011, appearing throughout the continuity and the subsequent DC Rebirth relaunch that began in 2016.
Flamingo is a supervillain appearing in American comic books published by DC Comics, commonly as an adversary of Batman.
Jane Doe is a character appearing in American comic books published by DC Comics. She first appeared in Arkham Asylum: Living Hell #1 and was created by Dan Slott and Ryan Sook.
