The Ratcatcher is a character appearing in American comic books and other media published by DC Comics, primarily as an enemy of Batman. He belongs to the collective of adversaries that make up the Dark Knight's rogues gallery. Once an actual rat-catcher in Gotham City, Flannegan sank into a life of crime. Calling himself the Ratcatcher because of his special ability to communicate with and train rats, Flannegan has used his minions to plague Gotham on more than one occasion by unleashing hordes of the vermin.

Norman Keith Breyfogle was an American artist, best known for his comic book art on DC Comics' Batman franchise from 1987 to 1995. During this time, he co-created the villains Ventriloquist and Ratcatcher with writers Alan Grant and John Wagner, and the characters Anarky, Jeremiah Arkham, Victor Zsasz, and Amygdala with Grant alone. He co-created with writers Gerard Jones and Len Strazewski the Malibu Comics Ultraverse flagship hero Prime, and both wrote and drew the Malibu-published series featuring his original character Metaphysique.