The New Batman Adventures

Dr. Harleen Quinzel:
[Holding a note] Care to tell me how this got in my office?

The Joker:
I put it there.

Dr. Harleen Quinzel:
I think the guards would be interested to know you've been out of your cell.

The Joker:
If you really were going to tell, you already would have. You know, sweets, I like what I've heard about you, especially the name. Harley Quinzel. Rework it a bit, and you get Harley Quinn.

Dr. Harleen Quinzel:
Like the clown character, Harlequin. I know. I've heard it before.

The Joker:
It's a name that puts a smile on my face. It makes me feel there's someone here I can relate to. Someone who might like to hear my secrets.