Season 5

Batman and Superman find themselves teamed up when Lex Luthor begins his operations in Gotham City to take down his arch-nemesis, employing a horde of the Batman's villains to do so.

Batman and Robin must battle Superman, who is under Lex Luthor's mind control, as the villain plans to launch a wave of robots and take over the world's armies.

Batman welcomes another member of the Justice League to Gotham – Green Arrow. The two team up when Vertigo, a villain who can affect people's sense of balance, arrives in the city with a diabolical plan.

Firefly tries to upgrade his powers with the aid of his new girlfriend Blaze, but is exposed to radioactive phosphorous and takes on a new more dangerous identity as Phosphorus.

Batman and Robin team up with the Flash to thwart Mirror Master's plans to trap everyone in their own mirror image.

Gotham citizens are bursting into hysterical laughter and dumping stolen goods into the river, and Batman is soon on the trail of the Joker.

Nearing defeat by his arch-foe Sinestro, Green Lantern sends his power ring to fellow Justice Leaguer Batman. Unfortunately the ring is instead intercepted by the nefarious Penguin.

A strange mishap causes the Joker's mind and personality to be downloaded into a computer, enabling him to control the new WayneTech Nanobots. This creates a new and improved body which attempts to destroy Batman, Robin, and the original Joker.

A trio of college misfits use stolen mutagens from Dr. Kirk Langstrom to transform themselves into animal forms and get revenge on those who have scorned them.

The Batman meets his opposite in the form of Wrath and his partner Scorn who are helping Joker, Penguin, Killer Croc, and Ventriloquist and Scarface with a job. Batman and Robin must stop their evil counterparts.

When Black Mask hires Hawkman's arch-nemesis the Shadow Thief to break him out of Arkham and assist in the theft of a meteorite, Batman must team up with fellow Justice League member Hawkman to defeat them.

When super-powered members of the Justice League begin disappearing one by one, Batman, Robin and Green Arrow must discover the mystery surrounding their disappearance.

The Joining attempts a second invasion of Earth with the stolen powers of the newly formed Justice League. Only the non-powered heroes Batman and Green Arrow remain to gain back their friends' powers and stand between the Joining and world conquest.