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.

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.

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 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.

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.

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 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 […]

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.

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.

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 […]

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 […]

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.

After escaping Arkham Asylum on Christmas Eve, the Joker takes over Gotham’s airwaves and terrorizes the city. He challenges Batman and Robin to find his hidden TV studio and free his hostages – Commissioner Gordon, Detective Bullock and Summer Gleeson – before midnight.

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.

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 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 […]

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.

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, […]

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 […]

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.

The leader of the Red Claw group (known herself only as Red Claw) attacks a military train and steals a viral plague, which she intends to release in Gotham if she isn’t paid a ransom, and Batman and Catwoman must put aside their differences and work together to stop Red Claw before it is too […]

While Bruce is in Europe on a Wayne Enterprises business trip, the theft of a jade cat statue occurs at Gotham State University. Barbara Gordon again becomes Batgirl to investigate, only to run into Catwoman, who is also investigating, pointing out that the acid residue used to destroy the security system is not her style. […]

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 […]

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 […]

Mayor Hamilton Hill’s miserable son, Jordan, becomes even sadder when his father uses his birthday party as a political gathering rather than a normal celebration, and ends up stowing away in the truck of the party clown hired by Hill for the party, whom he doesn’t know is actually the Joker in disguise. It is […]

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 […]

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 […]

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.

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 […]

Lloyd “Eddie” Ventrix is on the verge of losing his daughter, Kimberly (Elisabeth Moss), to his ex-wife, Helen, due to his past as a con artist. Determined not to lose Kimberly, Ventrix dons a suit, stolen from where he used to work while on parole, which grants the user invisibility but also becomes highly toxic […]

During a fight with Batman over a stolen Fabergé egg, the Penguin incapacitates Batman with poison gas. The Dark Knight is rescued by a teenage amateur detective named Sherman Grant and his friend Roberta, who hide Batman in Sherman’s basement long enough for him to recover before the Penguin finds them.

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 […]