A first-look at the new Justice League Action series was shown during the show’s panel at the San Diego Comic Con 2016.
Shazam Slam is a 45 minute special episode which contains the storyline of the first four episodes of Justice League Action. The villainous Black Adam battles Batman on the Rock of Eternity and during their fight a horde of Djin is unleashed. Now the Justice League -- with the help of Shazam and the Wizard -- must hunt down and defeat each Djinn in order to yet again save the world from destruction.
Batman, while on patrol in Gotham City, rescues a homeless man who turns out to be the Wizard. Together they embark on a mission to save Shazam from imprisonment by Black Adam. The latter has unleashed the all powerful Djinn Brothers from their imprisonment in the Rock of Eternity.
Superman, Wonder Woman, and Martian Manhunter try to stop the Djinn Calythos who has possessed Parasite and plans to use his scimitar to raise a volcano in Metropolis.
Green Arrow and Batman chase after the Djinn Uthool whom manages to posses Batman and turns him into a bat monster. With Superman to the rescue for Batman, Booster Gold, Wonder Woman, and Cyborg have to prevent a breach in the Hall of Justice's reactor core.
Superman, Batman and Wonder Woman pursue the remaining Djinn Abnegazar, Rath, and Nyorlath. However they manage to drain Superman and Wonder Woman's powers. John Constantine, Green Arrow, Plastic Man and Swamp Thing come to their aid. When the Djinn receive help from Black Adam, Batman arrives with Shazam. Together with the Justice League they defeat Black Adam and the Djinn.
Superman teams up with Space Cabbie and Hawkman to protect Mr. Mind from Lobo.
With most of the League unavailable, Firestorm is the only one to stop a family of androids from blowing up a nuclear power plant.
Batman teams up with John Constantine, Zatanna, and Swamp Thing when Solomon Grundy tries to raise a zombie army.
Wonder Woman and Superman have to rescue Joker from Mongul. Meanwhile Batman and Flash have to find a massive laughing gas bomb hidden away somewhere in Gotham.
Batman and Blue Beetle are thrown back in time where they must stop Chronos from destroying Batman on his first night in Gotham.
Superman ends up fighting the Apokoliptian Steppenwolf under a red sun, which renders him powerless. Batman and New God Big Barda come to his aid.
The Toyman turns the league into players of a computer game and its up to Cyborg to beat Toyman at his own game.
Superman has been infected by the "Repulse" which are advanced nanobots controlled by Lex Luthor. Wonder Woman and Hawkman try to find a way to save Superman and remove the "repulse" nanobots from his body.
A Halloween story. Doctor Fate, John Constatine, Zatanna and Batman are turned into 10 year old childeren by Clarion the Witch Boy. Clarion plans to use this unior league so he can acces the House of Mystery and steal the Helmet of Fate.
After defeating Harley Quinn, Batman and Zatanna encounter Brother Knight, who uses his dark magic on the Batmobile, which turns into a demonized vehicle. Batman, with the help of Etrigan the Demon, must save Zatanna, stop the Batmobile and defeat Brother Knight.
Felix Faust steals Zatanna's hat in order to free a ancient demon and get his youth back. While Etrigan and Batman try to stop the demon, Zatanna has to use every magical spell in her arsenal to get her magical hat back.
Luthor and Circe invade Themyscira, home of the Amazons, to obtain a staff that leads to the Fallen Realm and an artifact of the Greek Gods. Wonder Woman, Batman and Superman, must find a way to stop the villains plan.
Brainiac attacks Metropolis to add the city to his collection. Batman, Cyborg, Vixen and even Superman are unable to stop Brainiac's attack plan, so its up to Plastic Man to safe the day.
Superman takes Firestorm, Star Girl, and Blue Beetle on a tour of his fortress. However in the process Superman is trapped in the Phantom Zone, freeing General Zod in the process. Now the trio of teen superheroes has to stop him.
Lobo is back and he is chased by the Red Lanterns. Atrocitus and his Red Lanterns demand a stolen Red lantern ring back from Lobo, who seeks protection from Batman, Superman, and Wonder Woman. When Lobo's real plan unfolds it takes the combined power of the Red Lanters and the Justice league to stop him.
Mr. Freeze is determined to freeze Gotham City once and for all. And he is using Killer Frost as his power source. While Batman deals with Mr. Freeze its up to Firestorm, who has a crush on Killer Frost, to come to her rescue.
In a Fantastic Voyage-like adventure, Atom shrinks Batman and Wonder Woman, so they can enter Superman's bloodstream and destroy a lethal nanite virus.
The JLA find themselves in danger of losing Wonder Woman when the goddess Athena comes to Earth with an offer Diana can't refuse -- filling the position of the Goddess of Truth on Mt. Olympus.
Deadshot may be tough, but is he tough enough to stand against the Justice League's new interrogation routine?
Lex Luthor is so confident he knows more about Superman than anyone, he'd stake Superman's life on it...
In order for Batman to lure Deadshot into a trap, he has Plastic Man pose as Two-Face. Things go well at first until the real Two-Face escapes from Firestorm's custody.
While Superman visits the bottled city of Kandor, Brainiac attacks the Fortress of Solitude in hopes of reclaiming the Kryptonian city. With no one else available, The Atom commandeers one of the Superman Robots to fight the super genius.
Swamp Thing has a blind date with Poison Ivy, which leads to her controlling him in her plot to overrun Gotham City with plant. It is up to Batman to find an antidote to free Swamp Thing from Poison Ivy's control. Meanwhile, Poison Ivy is collaborating with Harley Quinn to help her keep Swamp Thing in check. So Superman, Firestorm, and Vixen work to fight Poison Ivy and Harley Quinn on their home turf.
Atom tries to pass up the chance to be part of the Justice League, but with an attack that takes out Batman and Wonder Woman he may decide to join the team after all!
Wily Lobo uses every trap and trick to try and catch the Flash, but Wil E Coyote may not be be the best inspiration to choose.
Another peaceful stakeout, except Firestorm is having trouble saying the right clever thing to impress Stargirl...
In a strange turn of events, the JLA enlist the help of Space Cabbie and Jonah Hex to stop the hijacking of an intergalactic space train.
Batman teams up with Booster Gold when an interdimensional creature starts literally eating up time.
Space Cabbie inadvertently learns about a great threat to the Justice League when one of his passengers turns out to be Darkseid.
Wonder Woman is ready when Deadshot drops by, and while her equipment never lets her down, her teammates sometimes do.
As the Justice League tries to protect the United Nations from Gorilla Grodd gorilla army, Mister Mxyzptlk pops up from the fifth dimension and thinks it would be great fun to put each of the superheroes' brains into another hero's body.
When fighting villains together is all you share, maybe it's time to find a new hobby.
Stargirl has to enlist Constantine's help when Klarion the Witch Boy takes the place of the boy she's supposed to be babysitting.
Space cabie likes taking selfies in the most impossible and improbable situations.
When one customer is being chased by Granny Goodness and the other is an alien giving birth, what's a Space Cabbie to do?
Green Arrow becomes involved with Booster Gold when he discovers that the self-centered superhero has brought dinosaurs back from the past for a money-making venture.
Raiding HIVE's jungle headquarters isn't easy, but when you need to get there by submarine it's only going to get tricker!
When the android Amazo attacks and duplicates the abilities and powers of Superman, Wonder Woman, Batman, Flash, Green Lantern, and Martian Manhunter, the strange super-villain Bizarro becomes the Justice League's last hope to turn things around.
It's a toy store heist, but who's to blame? Batman will try to find out, and hopefully save his friends along the way.
Joker springs Lex Luthor from prison with the help of a Mother Box. Its up to the the Justice League to catch them again.
Firestorm attends the opening of the new Science Center established by Martin Stein's old college roommate Mister Terrific until it get crashed by Calculator. When Calculator hacks Mister Terrific's T-spheres and separates Firestorm back into Ronnie Raymond and Martin Stein, it up to Martin Stein and Mister Terrific to work together to free Ronnie Raymond and defeat Calculator.
When obnoxious reporter Sid Sharp decides that Clark Kent is getting all his stories because of his connection to Superman, Sid decides to become his own superhero to out scoop him.
Luthor comes up with a new device to defeat Superman. But the kryptonite emitter has the unexpected ability to separate people in two, one passive and good (blue), the other aggressive and mean (red). Superman Red, Wonder Woman Red and Batman Red decide to use the weapon on the entire Justice League and conquer the world.
Sinestro's ring is suddenly much more powerful than usual, so the Justice League sends a microscopic Atom into his ring to find out what the cause might be.
When Firestorm discovers that League members have no memory of who they are, it's up to him to round them up in their secret identities and convince them they are superheroes.
A mysterious creature abducts Batman, Mr. Terrific, Luthor and two of the brainiest villains in the universe to put them to the test to discover who is the smartest among them.
The Toyman is at it again! But what is his one weakness?
When the Joker traps Batman, the Justice League allows Riddler to help them find him.
When Firestorm doesn't do his homework Superman will suffer the hilarious consequences...
When Gorilla Grodd takes control over Titano, only Harley Quinn can reach him.
When famous actor Mark Hamill is kidnapped by master villain The Joker it will take all his voice acting skills to escape.
When members of the Justice League are affected by the Phantom Zone ray and become phantom-like, their only hope for freedom is to somehow get a message to Booster Gold.
Lois Lane is getting close to discovering Superman's secret identity so he enlists Plastic Man to help stretch the truth..
Batman needs help from the new God Mr. Miracle to stop one of Darkseid's evil plans. But Batman first has to catch the universes greatest escape artist.
Poison Ivy is up to her tricks again and seduces Batman to help her escape the Watchtower. It's up to Plastic Man to save the day but is he immune to her mind-controlling spores?
Trapped in a “pocket dimension” the Justice League has to fight in an endless simulation that Darkseid can reset over and over again. Its up to the Batman to come up with an escape plan and contact the Justice League?
Green Arrow could teach a lesson or two about being stealthy. Is Plastic Man up the challenge?
Superman and Flash race for charity only to fall into a trap set by Lex Luthor. With the help of time traveling supervillain Chronos, Luthor has build a "time" suit that allows him to control everyone's speed.
The Space Cabbie is back helping the Justice League! On this adventure, he helps Stargirl as she practices for her driving test.
Besties Poison Ivy and Harley Quinn escape The Watchtower but Batman is never far behind!
Green Arrow and Plastic Man just caught Solomon Grundy, who ends up with them at the the annual Justice League Christmas party, what can go wrong? It all works out with help of Batman, the Flash and the spirit of Christmas. Although Green Arrow tries his best, the rest of the League decides to go to the S.T.A.R. labs Christmas party after all.
Back on Themyscira Supergirl and Wonder Woman practice their sparring on each other.
Plastic Man isn't great in the cold, but Batman will always find a way to make the best of a frozen situation.
When The Joker crashes a children's birthday party he's up to his usual mayhem, but with SHAZAM's help he may be turn out to be the best clown ever!
When Booster Gold starts to secretly give tours of the Watchtower to make some extra cash, he inadvertently brings in at least one super-villain disguised as a tourist.
When Green Lantern leaves his ring in an intergalactic restroom after washing his hands, he discovers it's gone, leading him on a wild chase for the aliens who might have taken it.
Mr. Mxyzptlk decides to create some mischief by granting Shazam's well-meaning Uncle Dudley with superpowers bigger than anyone in the league.
Mr. Mxyzptlk shows Supergirl and Superman that their innate goodness might not be so pure when he takes them to a parallel world where their counterparts are impossibly aggressive and spoiled.
While the Justice League is away on a mission, Plastic Man is not only left in charge of the Watchtower, but also of Krypto Superman's not so ordinary dog.
When Booster and the Justice League come under attack by a mysterious and unrelenting new villainess known as Red Velvet, Booster comes to realize she's actually the fiance he left at the altar in the future.
