Season 1

During the Christmas season, Harley and Poison Ivy lure Bruce into a hypnotic shopping spree while Joker threatens Gotham with a sonic bomb loud enough to deafen anyone within earshot of its explosion.

The origins of Tim Drake are traced, from street-tough and member of Two-Face's gang to the new Robin.

Mr. Freeze returns and seeks revenge on Gotham City, with a big surprise for Batman.

The Scarecrow develops a new toxin that, rather than inducing fear, eliminates it, making average people incredibly reckless and dangerous.

In an effort to further distance himself from Batman, Nightwing tries to go it alone to stop a smuggling ring and gets unexpected help from the seductive Catwoman.

Arnold Wesker is released from Arkham, completely free of his Scarface persona. But Scarface's old gang, needing their old boss back, begin working to drive Wesker back to his old ways.

Crime boss Edward "The King" Barlow dies and in his will leaves his arch-rival, the Joker, a large fortune. Joker immediately goes on a shopping spree, even searching for a replacement for Harley Quinn, but realizes too late that all the money is fake.

Robin fights to protect a young girl with amnesia who is being stalked by her "father", who turns out to be Clayface. Having created the girl from his own body to scout out the city, he now intends to reabsorb her.

Batman pursues an ex-model, who is now looking for revenge and calling herself "Calendar Girl".

Batman and Robin assist occultist Jason Blood when Klarion the Witch-boy takes control of Blood's alter-ego, Etrigan the Demon.

During a fight with the Scarecrow, Batgirl is ambushed on a rooftop and falls to her death. Having watched his daughter's demise, Jim Gordon blames Batman for her fate and vows revenge, even recruiting Bane in the process.

A lovelorn pyrotechnic engineer, Garfield Lynns, gets dumped by a big time singer named Cassidy. Lynns becomes the supervillain Firefly, bent on burning the woman who burned him.

Baby Doll becomes enamored of Killer Croc, and the pair forms a very unlikely yet very successful criminal duo. However, their partnership soon falls apart when Baby Doll learns that Croc is only using her to further his own criminal career.