Teenage Mutant Ninja Turtles (1987 TV series) (season 4)

With the Technodrome in serious need for new equipment, Bebop and Rocksteady are sent to Earth, disguised in human form, to capture the Channel 6 building and return it to Dimension X. To keep the Turtles distracted, Rocksteady & Bebop also deploy a robot duplicate of Master Splinter, but it malfunctions and starts going gonzo.

Villain: Shredder

Note: This episode takes place in season 7 THE SIDE SEASON.

A professor's new ray-gun causes plants to go wild and his pet ape Jocko to become a giant rampaging monkey. By using the same ray-gun, Donatello is increased to Jocko's size so he can fight the giant ape and save April from him.

While trying to see the new toys at the Toy Fair, Michelangelo stumbles upon a plot to take over a noted toy company.

Note: Master Splinter is not in this episode.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

The Turtles must battle a reanimated Terracotta Army after The Shredder steals an energy device shaped like a giant pearl, which is held and guarded by a Jade Dragon.

Krang frees Miyoko Saki, Shredder's mother from the retirement community. Shredder threatens the world's governments to surrender to Krang or he will gradually raise the world's heat, which causes New York to be in the middle of a massive heat wave. The Turtles get help from Colonel Yogurt, an air force officer to thwart Shredder, who is starting to get annoyed with his mother's success.

When General Tragg and his troops attack the Neutrino capital, the Neutrino leaders, Zenter and Gizzla, send their infant daughter Tribble through a portal to Earth, asking the Turtles to look after her, but Tribble causes big trouble for our heroes.

Villain: Shredder

Title Reference: Three Men and a Baby

An eccentric billionaire, Monroe Q. Flem, who is also a collector, wishes to collect every piece of TMNT memorabilia that he can get his evil hands on, including April O'Neil and the Turtles themselves. Title Reference: Lisztomania

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

A big-time Hollywood action movie star arrives in New York to promote his newest movie. Unfortunately, reality hits hard for Michelangelo as he discovers that his movie idol is not all he's cracked up to be. Meanwhile, Shredder and Krang steal a substance that can bring inanimate objects to life.

The Turtles must save the Earth from a massive energy drain and its Apocalyptic result by traveling to another dimension where turtles are the dominant species.

Villain: Shredder

Note: Bebop and Rocksteady are not in this episode.

A Technodrome computer disguised as an electronic keyboard ends up on Earth, and in the most unlikely of hands.

Villain: Shredder

Note: First appearance of Howie.

The Turtles meet Irma's boyfriend Howie, who has bought an old opera with the intent of making it into a nightclub. The Turtles must contend with the "Phantom of the Floxy", as does Shredder, who is planning to get the Technodrome back to Earth.

Villain: Shredder

Note: Final appearance of Howie.

Gadget Man comes out of retirement after 50 years, but is tricked by Shredder into fighting against the Turtles.

Villain: Shredder

Krang hires a multi-dimensional ring-master who intends on making the Teenage Mutant Ninja Turtles part of his circus by using an anti-aging serum. Leonardo and Michelangelo are turned into 5 Year olds.

Villain: Shredder

Title Reference: Back to the Egg

Note: Master Splinter and Bebop and Rocksteady are not in this episode.

Vengeful Baxter Stockman and an A.I. computer return to Earth from a dimensional limbo and capture the Turtles while luring Shredder into their trap as well.

Villains: Shredder and Baxter Stockman

Note: The intro has been changed with new animation.

Raphael must contend with a mobster named Pinky McFingers when he is kidnapped from a local comedy club. (This is Professor Barney Stockman's only episode - related to Baxter Stockman.)

Note: Master Splinter is not in this episode.

Note: Shredder. Krang, Bebop and Rocksteady are not in this episode.

Villain: Pinky McFingers

On their latest trip to Earth, Bebop and Rocksteady steal a machine that makes everyone scared of everything. Title Reference: Flash Gordon Conquers the Universe

Raphael wins a place at the owner of a fast food chain's party. When the yacht is taken hostage by Hi-Tech pirates he and the mysterious lizard-woman Mona Lisa work together to stop them.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

Bebop and Rocksteady use Krang's new Mutagen on Bebop's pet turtle Slash so he can do their housework for them. Slash runs away and is conned by an irritated entrepreneur into framing the TMNT.

Villain: Shredder

Note: First Appearance of Slash.

Frustrated with his bossy nature, Raphael and Michelangelo accidentally shoot Leonardo with the personality modifying ray, turning him into a fun loving 'dude' who neglects his responisbilities. Donatello Raphael and Michelangelo must stop Maestro G. Cleff from destroying the city.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

After many failed attempts from his rodent subjects to find food, the Rat King learns of an abandoned canister of mutagen lost in the sewers and claims it for himself. Then, he kidnaps Irma and Vernon and uses the mutagen to transform them into his mutant slaves, for the sole purpose of raiding food warehouses. It is later discovered that the mutations are unstable and can only be active if the Rat King plays his hypnotic flute.

When Michelangelo decides to put one of Donatello's inventions on max power for his own entertainment, he ends in a—quite literally—little problem. April and Vernon get caught in the shrinking ray while getting footage of a military ship and join Michelangelo on his wild adventure.

Title Reference: Honey, I Shrunk the Kids

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

An alien called a "Zipp" is sent to Earth, but this little alien soon becomes a big problem.

Villain: Shredder

Donatello invents a machine that can freeze time, which a deranged professor steals as part of a plan to conquer the world.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

Ninja Lotus Blossom's nightmares draw her to a strange artifact in the Turtles' possession. The artifact contains an angry spirit, whose wife's soul is within Lotus.

Villain: Shredder

Dr. Polidorius, a mad scientist plotting to mutate all humanity into aquatic-beings, creates Ray (not the similarly-named Mighty Mutanimals character), who possesses several abilities of different marine species. Ray kidnaps April O'Neil, and Polidorius mutates her into a fish-woman to be Ray's mate.

Note: Final Appearance of Donald J. Lofty.

Title Reference: Rebel Without a Cause

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

Bebop and Rocksteady dress up as superheroes as part of a plot to steal a diamond that will power up a laser Krang has created. Meanwhile, the Turtles must deal with a wave of hypnotic slaves under the command of J. Gordon HungerDunger.

Michelangelo meets his favourite comic book hero after he saves a weakened Brick Bradley in the sewers, and then he and Bugman take on the evil Electrozapper together.

Note: First Appearance of Bugman.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

The Turtles must baby-sit and protect a young rich girl named Buffy Shellhammer from Shredder and Krang, as she knows of a formula for a super fuel needed for the Technodrome.

Villain: Shredder

Michelangelo must rescue the other Turtles when they are captured by an evil scientist.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

Shredder has a plan to destroy the Turtles, but with the Technodrome's portal out of commission, he is unable to challenge them on Earth, so he uses the Dimensional Teleporter to bring his enemies to Dimension X.

Note: This is the final episode in which Michelangelo uses nunchaku as his main weapon rather than a grappling hook

Donatello earns his degree from Sopho University, but discovers that he has been mistaken for a girl, so he asks Irma to masquerade as him. Meanwhile, the real Donatello discovers a plot by Professor Philo Sopho to destroy the Earth.

Note: First Appearance of Professor Sopho.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

The Turtles switch sides and discover that the Shredder is the main man behind a ring of cufflink thefts that has suddenly hit New York. Title Reference: The Big Caper

Villain: Shredder

When a power surge causes an arcade machine to release Tempestra, It's up to Leonardo to stop her digital wrath before she becomes dangerously powerful.

Note: First Appearance of Tempestra.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

Splinter has suddenly disappeared, and a note left behind from him forces the Turtles to go their separate ways, but one by one, they are captured by Leatherhead and the Rat King.

Mote: Shredder, Krang, Bebop and Rocksteady are not in this episode.

A machine called the Transmogrifier causes Raphael and a cab driver to swap bodies, and it is later discovered that a defect in that same small device could do some very big damage to the city if activated.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

Villain: Mr. Big

While trying to contact the Turtle Nebula, Donatello meets an intelligent lizard alien named Algernon ("Algae" for short), who must help him and the other Turtles rescue April from a greedy man named Hostile Hiram Grelch.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode.

A failed mutagen experiment results in an invasion of giant insects and arachnids in New York City.

Villain: Shredder

A Foot Soldier named Alpha-1 has his intelligence increased, but it results in a Foot Soldier rebellion against Shredder and Krang and the duo's exile from the Technodrome.

While helping April investigate a report of giant monsters attacking a superstitious farming village, Leonardo is mistaken for an alien from another planet. The lone Turtle must avoid being hunted down into extinction while also trying to rescue April from a mad scientist.

Note: Shredder, Krang, Bebop and Rocksteady are not in this episode. Villain: Dr. Davens