The Joker steals an atomic bomb, and it is up to Batman and Robin to find and stop him. Since there is no time to spare, the duo enlist the help of Harley Quinn to track Joker down. Throughout the episode, it is briefly discussed how Harley met Joker.

Harley Quinn is released back into society, after being declared sane at Arkham Asylum. A misunderstanding at a clothing store, however, causes a snowball of comedic chaos to build around her.

When the Joker fires Harley for her incompetence, she tries going on a crime spree of her own, joining up with Poison Ivy, and the two become Gotham’s Queens of Crime, much to the Joker’s fury.

The Joker, Killer Croc, the Penguin, Two-Face, and Poison Ivy all meet at a poker table, each telling a tale of times when they almost defeated Batman. At the same time, Harley Quinn is about to kill Catwoman after she rescued Batman from the Joker’s electric chair, and Batman must save her.

Gotham’s new DA (Lawyer), Janet Van Dorn, is out to capture Batman, but both she and him end up captured by some of Batman’s main enemies instead. After the Prison riot in Arkham. They are soon put on a kangaroo trial by the Joker (the judge), Two-Face (the prosecutor), the Ventriloquist (the bailiff), Poison Ivy, […]

Batman comes face-to-face with his most powerful adversary yet: the chemically-enhanced assassin Bane. Originally hired by Rupert Thorne to kill Batman, Bane plans on taking control of Thorne’s criminal empire once Batman is destroyed. It is a fight to the death with all of Gotham in the balance, as Batman takes on the man who […]

A mysterious bat-like creature terrorizes Gotham City, causing the police force to pursue Batman. The Dark Knight must find the real perpetrator to clear his name.

The Joker covers Gotham City in a cloud of laughing gas and begins plundering the crazed city. But after Alfred is infected with the toxin, Batman has added incentive to stop the Joker and acquire an antidote from him before all of Gotham dies with a smile.

A washed-up actress named Mary Dahl has become bitter and insane after falling into obscurity and suffering from a disorder that prevents her body from growing to adulthood, thus biologically cursed with literal eternal youth. She kidnaps her TV family co-stars, who all led much happier lives and more successful careers than her, and holds […]

Harvey Dent, now calling himself Two-Face, resurfaces and starts robbing Rupert Thorne’s illegal businesses, preparing for a final confrontation with the crime boss, and Batman must stop his former friend before he and Thorne kill each other.

Bruce Wayne wakes up one morning to find that his life is completely upside-down: his parents are alive, the Batcave does not exist, Alfred does not remember Robin, and he is engaged to Selina Kyle. However, it doesn’t mean that Batman isn’t still around, and Bruce starts to wonder what has happened, especially after seeing […]

Joker creates a toxin that affects only fish, mutating them into Joker fish. Then, he targets innocent men who refuse to copyright his Joker fish. The Joker also captures Harvey Bullock, and Batman must rescue him and foil the Clown Prince of Crime’s scheme.

Batman encounters a new cat burglar calling herself Catwoman, and around the same time, meets a woman named Selina Kyle (as Bruce Wayne), to whom he is visibly attracted. When Selina runs into trouble with a terrorist group known as The Red Claw, who want the mountain lion sanctuary she was trying to protect, she […]

Bruce Wayne is released from prison on bail. Hagen, as it turns out, survived the murder attempt on him, but at a high cost: the formula entered his body and soaked every single one of his cells, turning him into a shape-shifting mutant. With his newfound powers, Hagen, now calling himself Clayface, decides to take […]

Batman is incarcerated in Arkham Asylum after being exposed to the Scarecrow’s fear-inducing gas. Batman knows that the Scarecrow has escaped for the second time and is planning to poison Gotham’s water supply with the same fear-inducing gas, and he must bring himself to break the law and escape from Arkham before the Scarecrow brings […]

Edward Nygma creates the video game The Riddle of the Minotaur for the company Competitron, but is fired by his superior Daniel Mockridge, who wants the profits for himself. Nygma vows revenge, and takes up the mantle of the Riddler two years later. While Batman sympathizes with Nygma, he and Robin find themselves forced to […]

Lyle Bolton, the new head of security at Arkham, is fired for his atrocious mistreatment of the inmates. Six months later, Bolton becomes the vigilante Lock-Up, and decides to put who he feels responsible for the ruin of the city behind bars. It’s up to Batman and Robin to save his victims.

Baron Jozek, furious at Batman for humiliating him at a dinner party (over Jozek’s underworld connections), hires Josiah Wormwood, a master in setting traps for his victims, to hunt down Batman and bring back the hero’s cape and cowl.

Just before he is to undergo the operation that will restore his sanity, Harvey Dent is kidnapped by a mysterious villain. Batman and Robin split up to nab the criminal who is behind the scheme in order to abduct the Dark Knight’s old friend. They suspect that either the Penguin or Rupert Thorne may be […]

After a prominent judge is injured during a struggle with some thugs demanding money from her in exchange for a strange tape, Bruce Wayne decides to take a trip to Yucca Springs, a resort where the judge had vacationed, and consult Dr. Hugo Strange, a psychiatrist. Bruce soon learns that Strange has invented a machine […]

Bitter scientist Victor Fries, as Mr. Freeze, attacks several divisions of GothCorp, each time stealing a piece for a secret weapon he intends to build. Batman investigates the connections, and discovers that the start of Freeze’s vendetta against GothCorp was a bitter falling out between Fries and GothCorp’s CEO, Ferris Boyle (Mark Hamill), during which […]

Mr. Freeze is sprung from Arkham by aging billionaire Grant Walker, who is looking to freeze the world and recreate it according to his own design. Batman and Robin infiltrate the billionaire’s underwater city and combat both high-tech robots and Mr. Freeze himself, who has decided to do Walker’s bidding and cover the earth in […]

Mobster Rupert Thorne attempts to use Harvey Dent’s secret split personality to blackmail him. But when Dent meets with Thorne at a chemical plant, “Big Bad Harv” takes over, and the resulting confrontation leads to an explosion that horribly scars half of Dent’s face and his entire body.

Cameron Kaiser builds a casino hotel modeled after the Joker, called “The Joker’s Wild”. The Joker sees this on the news and, enraged, escapes from Arkham again, with one thought on his mind: destroying the casino, unaware that this is exactly what Kaiser wants him to do as part of an insurance claim.

After a man named Charlie Collins curses at the Joker on the road for offensive driving, the Clown Prince of Crime corners him and intimidates him into doing him a “small favor”. Two years pass, and the Joker finally decides how to use Charlie: to sneak a bomb into the Peregrinator’s Club, where Commissioner Gordon […]

Miserable Wayne Industries scientist Jervis Tetch is unable to pursue the girl he loves, Alice the secretary. When she splits up from her boyfriend, he makes an advance and develops a fast friendship with her, until her boyfriend reconciles with her and proposes to her. Enraged, Tetch decides to take matters into his own hands, […]

Batman encounters the Scarecrow and attempts to foil his scheme to burn down Gotham University, but in the process is exposed to the Scarecrow’s fear gas, and is forced to face his own guilt over the death of his parents.

Bruce Wayne is framed for the attempted murder of Lucius Fox. The real perpetrator is an actor and master of disguise named Matt Hagen, who was disfigured in a car accident years ago. In order to keep his fame, he secretly started working for Roland Daggett, who provides him with a monthly supply of an […]

After freeing Talia from her father’s clutches and escaping from an avalanche, Batman and Robin follow the only clue they have – the word ‘Orpheus’. After discovering that ‘Orpheus’ is Ra’s private satellite that will orbit over the Sahara, the duo travel to the Demon’s desert stronghold. There, Batman learns that the satellite is actually […]

Batman investigates the appearance of a werewolf-like creature in Gotham, not realizing that the monster happens to be one of Bruce Wayne’s associates — Anthony Romulus, ex-Olympic champion. Behind the scheme is twisted chemist Professor Milo.

Seeking to prove once and for all that his is the superior mind, the Riddler lures Batman into a riddle-solving contest inside the virtual reality of a computer game in order to save Commissioner Gordon’s life. In the course of solving the riddles and escaping the Riddler’s traps, Batman learns that he is able to […]

Batman investigates a cult, called the Brotherhood, founded by the “mystic” Nostromos, after hearing about a number of stories from his colleagues about his ability to predict the future. Batman finds out that Nostromos is actually a con artist who was rigging near-fatal accidents to gain the confidence of Gotham’s upper class citizens, and he […]