Arkham Asylum for the Criminally Insane (Earth-31) is a psychiatric hospital on Earth-31. Many psychopathic criminals, including a number of Batman's enemies, have been imprisoned within the Asylum. 10 years after the Batman of Earth-31 "retires", Arkham Asylum has been renamed as "Arkham Home for the Emotionally Troubled", which occurs as a result of the extreme political correctness which had evolved in Earth-31's dystopian setting. The Joker is housed there, catatonic for 10 years since Batman's disappearance, but his catatonia breaks when the vigilante resumes action and returns to Gotham. He convinces the doctors at Arkham Asylum that he is sane and deserves to be released. Under the employ of the home is Bartholemew Wolper, a condescending psychologist who treats the Joker humanely,