The joke's on Commissioner Gordon when he arrives for his annual dental check-up, only to find the nefarious Joker scrubbing up! Can Batman save the good police commissioner from receiving a "killer smile?"

As Batman delves into the background of the Joker's sinister significant other, Harley Quinn finds that love can sometimes be a battlefield when one's Romeo is the Clown Prince of Crime!

A shocking look at the origins of Harley Quinn, as the young Arkham Asylum therapist becomes enamored with a pernicious patient known only as "the Joker."

Continuing the story of Harley Quinn's descent into crime and madness, the young therapist gives up her promising career for her chance to run amok with the Joker.

Eager to get back in the Joker's good graces, Harley Quinn searches his myriad of plans for the ultimate revenge on Batman.

Batman has been captured by the hazardous Harley Quinn. Chained and dangling over a tank of ravenous piranhas, how on Earth can the Dark Knight escape certain death?!

The pulse-pounding conclusion of "Mad Love." The Joker arrives on the scene of Harley's greatest triumph -- the capture of the Dark Knight! But how will the killer clown react when he finds that his girlfriend was able to succeed where he has always failed?