"[Narrating an animated/live action flashback of her origins] They say "If you want to tell a story right, you gotta start at the beginning". [A sperm cell penetrates an oval cell] Too far? Fine. This is me, Harleen Quinzel. When I was a kid, my dad traded me for a six-pack of beer, but however many times he tried to ditch me, I kept coming back. Eventually, he found me a new home; the good sisters of St. Bernadette's taught me a lot. But I was never an "establishment" kinda gal. All things considered, I did good. I even went to college, got my Ph.D., Had my heart broken once or twice; finding love, it's not easy. So I threw myself into my work, became a psychiatrist. That's when I met him – Mister J, my Joker! Oh, I fell hard – like "out of a plane without a parachute, right on your dumb fucking face" kinda hard! I lost all sense of who I was, I only had eyes for Puddin’. We all know the saying: "Behind every successful man, there's a badass broad". Well, that was me! I was the brains behind some of Mister J's greatest stunts! Not that he let anyone know it. I guess all good things have to come to an end. So... we broke up."