When a vicious bat creature known as Man-Bat, starts terrorizing Gotham City, everyone mistakenly thinks that Batman is the culprit. Batman must find out who the mysterious Man-Bat is and clear his own name.

When District Attorney Harvey Dent is poisoned after a dinner date, Batman makes the horrifying discovery that his date was Poison Ivy, a plant-obsessed villainess.

The Joker infiltrates the birthday party of Mayor Hill's son in order to plant a bomb.

When a maniacally punctilious man faces financial ruin because of attorney Hamilton Hill, he transforms into the devious Clock King and swears revenge on Hill, now the mayor of Gotham.

Batman escapes from being attacked by his own Batcomputer, which was sabatoged by HARDAC. He now seeks to get back Gordon, Hill and Bullock, who have all been replaced with robots.

Bruce Wayne is temporarily blinded when the Penguin steals a new police helicopter with weaponry developed by WayneTech.

Harley Quinn agrees to help Batman and Robin find the location of a stolen atomic bomb placed somewhere in Gotham by the Joker.

The Clock King plots against Mayor Hill after he steals an invention that allows him to travel at super speed.

Lyle Bolton Arkam's former chief of security becomes the vigilante Lock-up and kidnaps Commissioner Gordon and Mayor Hill seeing them as the cause of rampant crime in Gotham City.