Hugo Strange creates a AI database called DAVE (Digitally Advanced Villain Emulator), encoded with the minds of Gotham's greatest criminals, in order to better predict their crimes. However, DAVE breaks free and proclaims himself to be "Gotham's ultimate criminal mastermind".

The story of how the Commissioner's daughter became Batgirl and how her best friend becomes Poision Ivy is told.

Inspired by the Batman/Batgirl partnership, the Joker decides to recruit his own sidekick and gain a partner in crime.

Continuing where we left off in the first part, Barbara Gordon becomes Batgirl in order to save the commissioner, but does Batman really want a sidekick?

The Penguin, Mr. Freeze, and Alfred's old school chum are all on the trail of a sunken treasure in Gotham Harbor.

Maximillian Zeus, a millionaire who is also a Greek history fanatic, takes control of Gotham from the sky after losing to Mayor Grange in a re-election.

When the Batman takes a blow to the head during a fight with the Penguin, Gotham is left without its defender while an amnesiac Bruce Wayne must consider if he's a coward or not.

The Joker is on a rampage when he gets hold of Bane's injection system and turns himself into a rampaging beast.

When a rare Black Siberian Leopard is stolen, Batman and Batgirl suspect Catwoman and go to protect the second Black Siberian Leopard. But what happens when Joker beats them to the punch and brings the cats to Killgore Steed? It's a maze of doom with dangerous creatures. Can Catwoman, Batman, and Batgirl escape, or will they end up on Joker's wall?

A new villain, Gearhead, makes his first appearance robbing a charity race, and Batman soon finds himself forced to upgrade the Batmobile to keep up with the cybernetic bad guy.

After his most recent crime spree, Arnold Wesker is taken to Arkham and apparently ""cured"" by Dr. Hugo Strange. A new career as a children's entertainer lies before Wesker ... but can he escape the shadow of Scarface?

When Wayne Industries shuts down Cosmo Krank, a toymaker with a spotty safety record, the demented villain takes revenge by trying to shut down Bruce Wayne - permanently - with his diabolical toys.

High-ranking Gotham officials begin to embrace environmental causes after the delivery of mysterious plants, and it becomes clear they're under the influence of ... Poison Ivy.