Harley Quinn tries to impress her love while the origin of her career as The Featured in Nostalgia Critic: Top 11 Batman: TAS Episodes () See more». The Batman Adventures: Mad Love is a one-shot comic book written by Paul Dini (writer on Batman: The Animated Series and Batman Beyond) and Bruce Timm. The New Batman Adventures Episode 21 - Mad Love. Beginning with “Legends Of The Dark Knight,” The New Batman Adventures aired three episodes consecutive episodes that each represents a. Harley Quinn tries to impress her love while the origin of her career as The Joker's sidekick is revealed. (). © TopCartoons. All Rights Reserved. Mad Love is an episode of The New Batman Adventures. It's notable for telling the origin story of Harley Quinn, adapted from the original comic book one-shot of . "Mad Love" is the last aired episode of The New Batman Adventures. It provides the back story of Harley Quinn, the Joker's girlfriend, and was based on the comic book of the same name. Harley Quinn ties him to the chair, and just as Joker is about to kill the Commissioner, Batman.