Dr. Harleen Quinzel meets with Mister J (aka The Joker) in their first therapy session together at Arkham Asylum where Mister J is a patient. He's immediately smitten with her but decides to toy with her as she asks her questions. When she asks about his mother, he tells a horrific story of anger & violence. Harleen is shocked & begins to feel sorry for him. The questioning continues, and he is evasive. Realizing she's not going get much further with him today, Dr Quinzel asks how he feels about their session so far. He responds, "Baby, you're the greatest." Harleen cracks a smile. That smile drills deep into the Joker's heart & will be the catalyst for Harleen's coming transformation.