The Animated Series episode " Joker's Favor ",  as what was originally supposed to be the animated equivalent of a walk-on role; a number of police officers were to be taken hostage by someone jumping out of a pop out cake , and it was decided that to have the Joker do so himself would be too bizarre, although he ended up doing it anyway. Dini thus created a female sidekick for the Joker, who would become his love interest. Arleen Sorkin , a former star of the soap opera Days of Our Lives , appeared in a dream sequence on that series in which she wore a jester costume; Dini used this scene as an inspiration for Quinn. Mad Love recounts the character's origin story. Written and drawn by Dini and Timm, the comic book is told in the style and continuity of Batman: Harleen Frances Quinzel, PhD as an Arkham Asylum psychologist who falls in love with the Joker and becomes his accomplice and on-again, off-again girlfriend.