Paul Dini and Bruce Timm's origin story for Harley Quinn, originally published in the 1994 graphic novel "The Batman Adventures: Mad Love" was animated for the ending episode of 'The New Batman Adventures' television series, #onthisday in 1999. In “Mad Love”, as Joker (Mark Hamill) becomes flustered with trying to figure out the perfect way to kill the Batman, Harley Quinn’s (Arleen Sorkin) flirtations and simple suggestions anger him to the point he kicks her out of his hideout. Harley then thi