Dr. Leslie Thompkins (sometimes spelled Tompkins) is a fictional character from the Batman mythos. Created by writer Dennis O'Neil and artist Dick Giordano, she first appeared in Detective Comics #457 (March 1976).
Close friends with his parents, Leslie serves as a godparent, along with Alfred Pennyworth, and close confidante to Bruce Wayne. In DC continuity, she went into exile for allowing the death of Stephanie Brown, a.k.a. Spoiler. After fan outrage about DC's misogynistic portrayal of women, however, this was mended so that Leslie simply helped to fake Stephanie's death and took her to Africa.
Leslie disapproves of Bruce's vigilantism, and feels partly responsible for his transformation into Batman, fearing that somehow she failed him as a role model. Bruce has, though, admitted to feeling guilty for being unable to live up to her pacifist example. She also has been linked to Alfred romantically on more than one occasion.
Dr. Thompkins ran a clinic for criminals and drug addicts in Gotham City. While the majority of her patients were repeat offenders, she continued to do her job with great perseverance and determination. During the No Man's Land storyline, she ran the town's only medical clinic, operating under a strict 'No Violence' policy regardless of her patients's actions and intent. Even Killer Croc respected the rule and stayed out, despite his strong desire for revenge against Victor Zsasz.
After liquidating her assets and giving them to Spoiler's daughter, she fled to Africa. Batman followed her and forced a confession, coldly informing her that he may not stop violence, but he had never thrown another body onto the pile in the hopes of making a statement. He left warning her that she was just another murderer in his database, and if she ever returned to the United States or practiced medicine again, he would have her brought to justice.
Recently, a mysterious familiar figure has been stalking Tim Drake wearing Stephanie's Spoiler costume, which at one point Tim thought he imagined it to be Stephanie herself. It is later revealed that the stalker is indeed Stephanie, which led into question of whether Dr. Thompkin truly did neglect treatment for her. The details of Stephanie's return reveals on Robin #174,as Dr. Thompkins faked the death of the girl and switching the body with an overdose victim who had a similar body type.
Leslie herself meanwhile has made a recent, and rather unexpected appearance in the miniseries Gotham Underground, having appeared before an injured Nightwing, currently undercover, and offering him aid. It was later revealed that Leslie was a hallucination and it was the Riddler who had saved Nightwing.
The Robin/Spoiler one-shot special from 2008 showed both Leslie and Stephanie alive and in exile, protecting a village somewhere in Africa.
In the short story "Best of All," featured in the non-canonical anthology "The Further Adventures of The Joker", the Joker tells Batman that Leslie is his mother. He also says that she committed him to a mental institution as a child after he murdered his father, who was abusing her.