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.

Creyendo que desalojaban a un hombre sin hogar durante un patrullaje por ciudad Gótica, Batman interviene para ayudar a un misterioso hombre en el cual, se encuentra en una misión para salvar a Shazam, por parte del villano conocido como Black Ádam, cuando este libera a unos seres mágicos llamados Jinn, luego de que este sea liberado de su encarcelamiento en la Roca de la Eternidad.

Superman, Wonder Woman, y el Martian Manhunter tratan de detener a un Djinn conocido como Calythos, que ha poseído a Parásite, al que le roba sus poderes, y planea utilizarlo junto con Scimitar para crear un volcán sobre Metropolis.

Trabajando con Flecha Verde, Batman persigue a un Djinn llamado Uthool. Cuando Uthool desaparece de repente, resulta que Uthool ha poseído a Batman, venciend a Booster Gold, Wonder Woman, y Cyborg, como parte de su plan para llegar al Salón de la Justicia el sitio donde se encuentra el punto de entradapara llegar al manto de la Tierra, donde obntendrá la temperatura necesaria para absorber la energía de la Tierra. Con Uthool poseyendo a Batman, éste trata de combair su posesión, mientras que Superman termina luchando contra Uthool con el fin de sacar al ser mágico de Batman.

Superman, Batman, y la Mujer Maravilla y persiguen a los restantes Djinn conocidos como Abnegazar, Rath y Nyorlath que planean liberar a Calythos. Estos a su vez drenaron los poderes de Superman y la Mujer Maravilla cuando estos mencionaban su propios nombres. John Constantine llega para ayudarlos junto con Flecha Verde, Plastic Man, y la Swamp Thing también llegan a detener a los tres Djinn. posteriormente, BlackÁdam se libera de su prisión terrenal para combatir al héroe Batman mientras que en ese momento llega Shazam ve como la Liga de la Justicia combaten a Black Ádam y a los restantes Djinn.

Un equipo se une a Superman formado por el Space Cabbie y Hawkman para proteger al villano Mr. Mind del cazarrecompensas intergaláctico conocido como Lobo y encerrar en prisión a Mr. Mind.

Con la mayor parte de la Liga de la Justicia en una misión, Firestorm es el único que se queda deteniendo el ataque de una familia de robots llamados La Familia Nuclear cuando estos intentan atacar una planta de energía nuclear.

Un equipos conformado por Batman, John Constantine, Zatanna, y la Cosa del Pantano, se enfrentan a un Solomon Grundy que trata de criar a un ejército de Zombies utilizando una poderosa gema mágica que también le permitirá transformar a cualquier persona en zombies.

La Mujer Maravilla y Superman tienen que rescatar al Joker de Mongul. Mientras tanto, Batman y Flash tratan de detener una bomba de gas de la risa masiva que el Joker había escondido ciudad Gótica.

Batman y Blue Beetle viajan en el tiempo al pasado para poder atrapar al villano Cronos que intenta eliminar a Batman en su primera noche en Ciudad Gótica, donde se enfrenta al mafioso Carmine Falcone y sus hombres.

Después de una misión de Batman y Big Barda cuando luchan contra los Parademons, Superman es transportado a un planeta que orbita alrededor de un sol rojo donde fue conquistado por Steppenwolf. Esto es parte del plan que tiene Steppenwolf para poder matar a Superman y convertirse en una leyenda. Ahora, como sus poderes se agotan lentamente, Superman debe derrotar a Steppenwolf y volver a la Tierra. Mientras tanto, Batman y Big Barda llegan a la fortaleza de Darkseid en Apokolips con el fin de encontrar información sobre el paradero de Superman y llegar a rescatarlo.

Cuando el satélite de la Liga de la Justicia, la Atalaya, es invadida por el El Juguetero y su ejército de.... juguetes, Cyborg, la Mujer Maravilla, Superman, y Batman, se convierten en jugadores incidentales en una retorcida versión de un videojuego de lucha, Cyborg tendrá que utilizar toda sus habilidades de los videojuegos para salir de ésta.

Superman ha sido infectado por un ser robotizado llamado "Repulse", revelando que fue construido por Lex Luthor, y ahora se ha convertido en el nuevo Repulse. A medida que Mujer Maravilla y Hawkman tratan de encontrar una manera de salvarlo, Superman debe quitarse la tecnología de los nanobots de su cuerpo el uso de una tecnología que utiliza la tecnología de un agujero negro que antes detuvo de un accidente anterior.

Caín el cuidador le cuenta una historia de Halloween al público relacionada a la Casa del Misterio, donde Batman, Zatanna, John Constantine, y el Doctor Fate son convertidos en niños de 10 años por parte de las maquinaciones de Klarion el niño brujo. Ahora, con 10 años de edad, la Liga de la Justicia deberá encontrar una manera de derrotar a Klarion, y regresar a la normalidad, y escapar de la Casa del Misterio antes de que esta desaparezca antes de la medianoche.

Después de derrotar a Harley Quinn, Batman y Zatanna sostienen un encuentro con Hermano de la Noche que utilizó su magia negra para controlar el Batimóvil y secuestrar a la hecicera homo magi Zatanna. Con la ayuda de Etrigan el Demonio, Batman debe salvarla, detener el Batimóvil, y la derrotar al Hermano de la noche.

El villano Felix Faust roba el sombrero de Zatanna, con el fin de liberar a un poderoso demonio y poder obtener de vuelta su eterna juventud. Mientras tanto, Batman y Etrigan se enfrentan contra el demonio, mientras que Zatanna utiliza su arsenal de trucos mágicos para conseguir que su sombrero regrese de manos de Felix Faust.

Lex Luthor y la hechicera Circe invaden Isla Themyscira, hogar de las guerreras Amazonas y de Wonder Woman, para poder obtener un personal que les lleve a Fallen Realm y obtener un artefacto de los dioses olímpicos griegos. Con la ayuda de Superman y Batman, la Mujer Maravilla deberá encontrar una manera para detener a los villanos antes de que sea demasiado tarde.

Mientras que Superman, Batman, Cyborg y Vixen tratan de detener a Brainiac, Plastic Man viaja de polizón en la nave espacial de Brainiac para destruir el rayo de contracción y salvar al mundo para poder probar que es un digno superhéroe.

Mientras Superman le da a Blue Beetle, Firestorm y Stargirl un tour por la Fortaleza de la Soledad , se enfrentan con el General Zod, Faora, y un villano kryptoniano no identificado que accidentalmente resultan liberados de la Zona Fantasma. Ahora, con Superman atrapado dentro de la dimensión, los tres jóvenes héroes adolescentes deben trabajar juntos para poder detener a los villanos kryptonianos.

El cazarrecompensas Lobo robó los anillos de los Red Lanterns de los linternas Atrocitus, Zilius Zox y el resto de los Red Lanterns, para utilizarlos contra Batman, Superman y Wonder Woman con el fin de obtener una puntuación. Posteriomente, Lobo desbloquea el poder arácnido de un guantelete, la Liga de la Justicia y de los Red Lanterns deben unirse para derrotarlo.

Mr. Freeze vuela en su avión para congelar a toda Ciudad Gótica utilizando el poder de Killer Frost como su fuente de energía. Mientras Batman se enfrenta a Mr. Freeze, Firestorm tendrá que enfrentarse a Killer Frost y al mismo tiempo se enamora de la villana.

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.

Atom encoge a Superman al tamaño microscópico para que pueda entrar a la ciudad embotellada de Kandor. Cuando Brainiac irrumpe en la fortaleza de la soledad y recupera la botella, Atom debe detener a Brainiac en sus dominios.

When Swamp Thing has a blind date with Poison Ivy which leads to her controlling him in her plot to overrun Gotham City with plants, Batman works on 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 alien 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....

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!

The Justice League is back, "with lightning-paced action and heroics.” This show will be including everyone: Superman. Batman, Wonder Woman, Hawkman, Green Arrow, Zatanna

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 frees Luthor with a mother box and forces him to spend the day together, hopping all over the world, with the Justice League hot on their trail trying to catch up.

When a mysterious alien abducts Mr. Terrific, Batman, Luthor and two of the brainiest villains in the universe, he puts them to a test to discover who is the smartest among them.

Reporter Sid Sharp has aspirations on becoming a superhero.

Luthor comes up with a new device to defeat Superman. But the kryptonite emitter has the unexpected ability to, once hit, separate each Justice Leaguer in two, one passive and good (blue), the other aggressive and mean (red).

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.