Mxyzptlk's Revenge: A doorway appears inside the Hall of Justice. Superman and Batman wonder where it originated from and where it leads. Then the voice of Mxyzptlk is heard and Superman realizes who's responsible. The door opens up, sucking everything inside, including Batman and Superman.

Roller Coaster: Three kids ride a condemned roller coaster that gradually falls apart. The Wonder Twins and Gleek, exiting a movie theater, respond to the crisis. After Zan accidentally breaks a rusted power control and realizing that they need additional help in the rescue attempt they send Gleek to the Hall of Justice and find Atom.

Once Upon a Poltergeist: At the Wayne Building in Gotham City, a confused spirit of a Mohawk Indian terrorizes the area due to his belief that the building sits on top of an ancient burial site. Batman, Robin, and Apache Chief battle the spirit but its power is greater.

Warpland: Superman and Batman are pulled into a space warp where they come across a strange planet inhabited by aliens known as Zoons. Two Gleeks Are Deadlier Than One: Wonder Woman and Green Lantern think the Legion of Doom will strike since the entire Justice League is going to meet in the Hall of Justice the next day. Jayna and Zan are put in charge of security during the night. Giganta sets a trap and captures Gleek with bananas and takes him to Gorillia Grodd. A mechanical duplicate of Gleek arrives at the Hall of Justice to use his killer laser eyes on the Justice League and help Grodd and Giganta take over the Hall of Justice. Bulgor the Behemoth: A writer turns into the creature he created after a lightning bolt electrocutes an electrical tower nearby. Apache Chief and Superman are on hand to stop the behemoth from continuing his destructive ways.

The Krypton Syndrome: Superman travels through a time warp and is taken back to the hours leading up to Krypton's explosion. He saves the planet by stopping the solar flares using the Super-Mobile core and then returns to the present to find Earth a very different place. Robin confronts him and has no idea who Superman is and then remarks that the Justice League was defeated by the Legion of Doom, he is the only one alive. He soon realizes that by saving Krypton that it erased his time on Earth and that nobody had ever heard of Superman before. Invasion of the Space Dolls: Space dolls try to take over the world but run out of batteries.

Terror on the Titanic: Two divers find the Titanic which has become inhabited by a mutated form of Algae. Aquaman and Black Vulcan respond to the danger. After a lightning blast from Black Vulcan, the Titanic comes alive, and begins to destroy everything in its path. Ultimately the ship sinks back into the ocean after slamming into a jagged iceberg.

Revenge of Doom: Batman and Robin foil some building constructors' plans to revive a destroyed Hall of Doom and turn it into a Museum. When Batman figures something is wrong, the building constructors reveal themselves to be Lex Luthor, Soloman Grundy, Sinestro and the rest of the Legion of Doom.

A Pint of Life: The Wonder Twins and Aquaman search the Amazon River for Doctor Marks who's on an expedition. The doctor's son needs a blood transfusion and there's only a moment of hours left for the Super Friends to locate the doctor.

Day of the Dinosaurs: The Hall of Justice, with Wonder Woman and Samurai inside, gets swallowed up into the Earth. After tumbling through layers of rock, the Hall of Justices comes to a stop at a strange forgotten world beneath our own. When Wonder Woman and Samurai explore the strange subterranean world, they are attacked by prehistoric creatures called Slarums. Technos saves the two Super Friends and offers to show them the world of the Volti.

Return of the Phantoms: The three Phantom Zone villains: Logar, Hol, and Romlok are freed by an alien who doesn't realize they are criminals. In this episode they force the alien to travel back in time with them in an attempt to alter Superboy's life—hoping that he will never grow up to become Superman. Meanwhile, in the future, Superman and Green Lantern learn of the plot from the alien and travel back in time to save Superman's own past and capture the Phantom Zone villains.

Bully for You: Teen angst and bullying are spotlighted at the start of this episode. In the meantime, after a daring mission on a skyscraper, Batman loses his utility belt. The boy who was being bullied finds the belt and seeks revenge. Unfortunately, the boy doesn't know what all power that the belt contains and he accidentally switches on a high frequency signal that leads to Earth shaking effects and building destruction.

Prisoners of Sleep: While investigating a strange electrified spiked metal pod, Superman and Batman unwittingly unleash the cloud-like prisoner inside (named Sleep), and are then trapped in a dream world.

An Unexpected Treasure: Two teenagers discover an ancient warship buried underneath the desert sands and they take off in it. The Wonder Twins and Gleek attempt to rescue the teens and they ultimately seek the help of Hawkman and Hawkgirl. The Malusian Blob: Space shuttle astronauts unwittingly load an alien chemical blob into their cargo bay (assuming it to be space junk). The blob starts eating metal and the astronauts call for help. Batman, Robin and Black Vulcan arrive and rescue the astronauts. Assuming the blob burned up in the atmosphere, they return to Earth, but then the blob reappears and after some failed attempts, they figure out that the substance may have an unstable reaction to sugar.

Playground of Doom: Giant children arrive on Earth and create destruction all over the city. A call to the children's home planet and a visit from some influential individuals put a stop to the children's pranks.

Space Racers: The Wonder Twins and Gleek are on weekend patrol duty when the Justice League patrol craft is invaded by space racing punks. After the Wonder Twins decide to teach them to respect the law, the space racing punks decide to retreat by dematerializing. Unfortunately, they take Jayna along with them and hold her hostage. The Recruiter: Superman and Wonder Woman are abducted by a race of alien beings and are forced to play intergalactic football which is referred to as space ball in this episode.