Stacy Baker

Dr. Stacy Baker first appeared in Batman: Arkham City (2011). She enters Arkham City as part of a team of doctors intending to provide medical care to the inmates of the superprison. Although a security force accompanies the medical professionals, Joker and his cronies capture the team in an attempt to force its members to treat his ailment. Despite her efforts, she is unable to readily devise a cure, so Harley Quinn and Joker imprison her within the steel mill to intimidate her into complying with their demands. However, before they are able to severely harm her, Batman breaks into the mill and rescues her. Afterwards, she informs Batman that at toxin in Joker 's blood is killing him, and that he blames something called "Titan ." Batman instructs her to remain in the mill for her own safety.