After losing the mayoral election, billionaire technologies' mogul Maximilian Zeus takes to the skies in an airship in order to rule over Gotham like a god. Employing the Batwing and getting an assist from Batgirl, who's made her way onto the ship, Batman tries to bring the ego-maniacal Zeus back to earth.
Joker takes on an apprentice who is a school mate (class clown) of Batgirl. In the end, when given the opportunity to kill batman and bat-girl the apprentice boy, can't go through with it. Batman and girl save the boy for boiling vats of acid and the boy knocks out joker with his own weapon.
When Alfred joins Ewan Fripp, an "old school chum" and world renowned treasure hunter, on his latest adventure, the pair find themselves in a race with Penguin and Mr. Freeze to locate a fortune which has been long hidden somewhere in Gotham.
The Digitally Advanced Villain Emulator, or D.A.V.E., is an artificially intelligent computer program made up of the combined psychological profiles of the most diabolical criminals committed to Arkham Asylum.
When the circus comes to Gotham, ruthless crime boss Tony Zucco demands protection money from the Flying Graysons, a family of trapeze artists. They refuse to pay and Zucco exacts revenge, leaving Dick, the youngest Grayson, an orphan. Having experienced a similar tragedy himself, Batman is driven to take down Zucco and in the process discovers an unexpected bond with Dick.
After countless humiliations at the hands of the Batman, Penguin realizes that while he may not be able to take down the Dark Knight alone an all-star team of Gotham's most dangerous villains might just do the trick. While trying to stop this powerful force Batman must deal with team building issues of his own as Batgirl and Robin meet for the first time.
Shape-shifting villain Clayface turns himself in, promising to give up his criminal ways and hoping to earn a second life for his alter ego, Ethan Bennett. But when a new Clayface takes to the streets of Gotham, Ethan wants to prove his worth as a hero by helping take down this threat. Having been burned in the past by a seemingly reformed Ethan, Batman isn't sure his friend can be trusted.
When evidence from a series of art thefts by a new costumed villain with the power to replicate implicates a close friend, Batman believes there must be another explanation. Now the Dark Knight must unmask the identity of this rogue called the "Everywhere Man" and prove his friend's innocence.
Professor Hugo Strange unleashes a deadly toxin on all of Gotham, turning its entire population into zombie-like creatures. With the fate of the city in his hands, Batman must overcome incredible odds to find an antidote before the condition is rendered permanent.
The brutal and notorious crime lord Black Mask is captured by the Batman, but can jail hold him when his criminal organization attempts to break him out? Robin and Batgirl must stop Black Mask's escape on their own while Batman attempts to locate and disarm a weapon of mass destruction.