In a last ditch attempt to gain power for the Technodrome, Krang sends Rocksteady and Bebop to steal a newly created set of energy modules from a hi-tech science lab located at Fort Charles.
But the bungling duo are halted by a super-computer, CY-CLOMPS, which is protecting the modules. Not one to be denied his spoils, Shredder re-programs CY-CLOMPS from the technodrome, and commands it to trap April (present at the lab to do a live broadcast) in an airtight vault!
When the Turtles arrive at the scene, they find themselves locked in combat with various robots and defences activated by
CY-CLOMPS to prevent them from reaching April. The Turtles eventually succeed however in pulling CY-CLOMP'S plug , and they rescue the reporter.
However, whilst the turtles were locking horns with CY-CLOMPS at Fort Charles, Shredder was able to locate another lab, which contained a similar set of energy modules, and quickly acquired them. The Technodrome is re-energized, and now has enough power to rise to the surface!
An affectionate, cuddly creature from another world shows up on Earth, with the ability to move objects by mental power. It turns out to be an escaped pet of the Neutrinos. The Neutrinos - Dask, Kala and Zak are in search of Kala's pet Grybyx. As it turns out, the small and cuddly creature can turn into a humongous monster. This transformation occurs when it gets fed pizza, and soon enough the gigantic Grybyx-creature threatens the Turtles and the city. Of course, Shredder and Krang want the Grybyx, but they end up getting more than they bargained for. After transforming back into its old self, the Neutrinos return the once-again cuddly little creature to their dimension.moreless
While the Turtles are suffering from "Turtle Pox," a disease that affects only mutant Turtles, Krang has developed a robotic turtle that he calls Metalhead in an effort to destroy the Ninja Ts. But first, in order to program the robot, Krang needs a "Brainalyzer" scan of the Turtles. Shredder, Rocksteady and Bebop travel up to the surface and force the Turtles out of hiding by breaking into various business establishments throughout the City. Sure enough, the Turtles arrive at the scene of the crime, allowing Shredder to zap them with the Brainalyzer and making good their escape. The Turtles are confused but relieved to be back at home in their beds.moreless
While Raphael is reliving the past, via the Turtles' photo album, their Frog friends in the Florida Swamps (Napolean Bonafrog, Genghis Frog, Atilla and Rasputin) are being terrorized by a mutant alligator known as Leatherhead, who makes them his slaves. They decide to call the Turtles for help.
Meanwhile, Krang's scanner picks up Leatherhead's activities and he sends Shredder, Rocksteady and Bebop to the same Florida Swamp to retrieve the mutant alligator and use him to help defeat the Turtles.
But no sooner do the Turtles and April arrive when they are captured by Leatherhead. The Frogs turn the tables and help the Turtles capture Leatherhead.
Shredder and company arrive in the Florida Swamp and stumble upon the Turtles and April, the Frogs and Leatherhead. They decide to track them for awhile before charging in and attacking. Sure enough he finds his golden opppportunity when he rescues Leatherhead from the quicksand that the Turtles, the Frogs, and Leatherhead have fallen into.
Noticing that the Technodrome's ballast tanks are low, Krang decides to take the Technodrome closer to the surface so that it can siphon off water from an underground reservoir. Meanwhile, Donatello has built a device that will track the Technodrome's movements. No sooner is he done, then the Technodrome is on the move. Observing the action of both the Turtles and Shredder and company is none other than Baxter Stockman, who has recently returned to the current dimension and is desperate to enact his revenge on both Shredder and the Turtles. The Turtles, along with April, arrive at the underground water tank before Shredder, and while they prepare for him, April is kidnapped by Baxter Stockman.moreless
After April reports live, from the Malicurian Embassy, of the Malicurian Emporer's decision to sell mining rights to the vast deposit of Lydiam 90 that was recently discovered in his country, she prepares herself for the big party that is being held at the Embassy later that night. Irma, however, persuades her to trade in her news journalist "uniform" for a fancy party gown so that she might attract an eligible bachelor. Meanwhile, far below the Earth's surface, Shredder complains to Krang that the Technodrome is falling apart and that they need more power to properly maintain life support systems. Krang suggests that a small piece of Lydium 90 would supply more than enough power to bring the Technodrome back up to speed.moreless
The Turtles receive a blast from the past when Dinosaurs invade the Big Apple. The TMNT attempt to coral the beasts, and more or less succeed.
Befriending a young diplodocus they dub "Dippy", the Turtles trace the invading dinos to their source, and they are shocked by what they find there: a "lost world", hidden deep beneath the earth's core, where the ferocious creatures of yesterday still thrive. The TMNT find out that the reason for the Dinosaur's continued preservation is the radiation sent off by a mystical energy crystal.
Before the turtles can relax and explore this "new world", they find out Shredder and Krang are after the crystal, intending to use it in another diabolical scheme to re-power the Technodrome. The Turtles join forces with Dippy to stop the villains, they are able to drive Shredder back at first, but their actions provoke Krang to take a trip to the savage land himself.
Upon arriving, he builds a hi-tech titanium plated battle fortress, from where he can harness the crystal's powerful energies and channel them into the Technodrome directly from this base. Shredder eventually manages to outwit the TMNT, and succeeds in obtaining the crystal.
But things go awry when Shredder accidentally drops the crystal, damaging it, without the crystal, (the source of their life-energy), Dippy and his fellow dinos begin to slowly die.
The TMNT attempt to penetrate Krang's fortress with Dippy's help, but his strength alone isn't enough, Just when the green machine think all is lost, Dippy calls on other dinosaurs to assist him, with their combined efforts, the dinos are able to break into Krang's fortress, and a fierce battle ensues...
Mr. Thompson orders April into his office to assign her a news story. It seems that the nightwatchman at Cybertech Laboratories spotted "some weird character hanging around" -- Mr. Thompson is convinced that he must be a friend of "April's Turtles." She assures him that he is not and heads off to Cybertech Lab with mini-cam in hand. Meanwhile, down in the Turtles' Lair, Donatello is displaying his new Super Pizza Maker. The other Turtles are impressed with its ability to make pizza in a matter of seconds, but when it is switched into high gear -- the machine overloads and explodes, causing loose parts to scatter across the room. One of these "loose screws" hits Leonardo, causing "just a bruise." Suddenly, April contacts them from Cybertech Labs, via the Turtle Com, to inform them that Shredder, Rocksteady and Bebop are up to no good. While she waits for the Turtles to arrive (including Splinter, who is concerned about Leonardo's injury,) April begins to videotape Shredder and his "goons" from the rafters high above the floor. But she is spotted by Shredder, who sends Rocksteady and Bebop up after her.moreless
Leonardo, Donatello and Raphael are enjoying an episode of professional wrestling when Michelangelo enters the room and turns the channel to "ON TRIAL" hosted by Clayton Kellerman, a Morton Downey-like rabble rouser who suggests that a clear and present danger is lurking in the sewers: Teenage Mutant Ninja Turtles. The Turtles are aghast and can't understand why people would hate them. April has her make-up department make human masks so the Turtles could move more freely in the streets.
Meanwhile, Shredder is sweating from the heat, as Krang "chews him out" for his failure to retrieve the necessary components to repair the refrigeration units. Shredder has had enough and suggests that Krang go up on the Earth's surface and get what he needs and eliminate the Turtles himself. Krang considers this a good idea.
Beneath the city streets, deep in the bowels of the sewer system, Splinter is less than pleased with the Turtles when he encounters them lounging around the "TV Room," rather than practicing their daily katas (martial arts/ninja exercises.) The Turtles lamely suggest that with Shredder out of the way (it seems he and Krang were sent to the Earth's core in a previous episode), they deserve a vacation. Splinter suggests that they have no proof that Shredder and Krang are "vanquished" and that there is still plenty of other crime/criminals to be fought.
Meanwhile, miles below the Earth's surface, rests the Technodrome. Inside, Shredder "whines" to Krang about when they will take the Technodrome to the surface. Krang tells Shredder that they are low on power and that certain essential equipment (i.e. the Protein Silicon Brain Computer) has been damaged, thanks to Shredder's incompetence. But Krang reassures him that they can be repaired but it will require a trip to the surface to obtain the necessary parts.
the littles are accidently sent into orbit on the space shuttle and dinky must put back a computer chip he took before the ship burns up in the atmosphere