Batman: The Animated Series - Season 2 (1993)

The Mad Hatter plants mind-control devices inside miniature native dolls distributed to high-society Gothamites by Veronica Vreeland.

After losing his medical license, Dr. Matthew Thorne, younger brother of crime boss Rupert Thorne and a former colleague of Thomas Wayne and Leslie Tompkins, is forced to peddle his services to his brother and members of his gang. When Rupert insists that Matthew perform his heart surgery, Batman must protect both of them from assassination.

Poison Ivy, after being released from Arkham, has apparently settled for a normal life, married to her psychiatrist and doting on his two children. Batman and Robin are suspicious, however, because semi-sentient plant-like creatures are committing mayhem all over Gotham.

Killer Croc escapes a prison train and finds refuge with a group of former circus freaks living in the mountains, who take pity on him.

Batman travels to Egypt and joins with Talia to hunt down Ra's al Ghul who is searching for an ancient source of ultimate power.

A district attorney who loathes Batman is forced to defend him in a twisted parody of a trial run by the inmates of Arkham Asylum who have seized control and taken them both prisoner.

When Joker steals a nuclear weapon, Batman arranges for Harley Quinn's release from Arkham, so she can help him track the Joker down.