Teenage Mutant Ninja Turtles (2003)

In their underground lair deep beneath the city streets, the Turtles and Master Splinter are suddenly attacked by a horde of Mouser robots!

The Turtles discover the source of the Mouser robots that trashed their old lair: Dr. Baxter Stockman -- a noted technological genius/inventor, who tries to pass off the Mousers as a means to eradicate the city's rat problem.

When April O'Neil wakes up in the Turtle's lair she has major trouble dealing with the reality of four giant talking Turtles and a Zen-master rat, but she calms down when she hears the official ORIGIN of the TMNT!

Raphael is a little cooped up underground with only his brothers and Master Splinter. When Raphael almost clobbers Michelangelo in some brotherly sparring, it's pretty apparent that Raphael needs to get out to let of a little steam.

When a scientist accidentally unleashes a super-powered Nanotech monster with a childlike mind, it adopts a small-time grifter as its father figure, and the mayhem begins!

The turtles investigating a strange blackout, discover the Foot Ninja stealing a Japanese ceremonial sword from the Metropolitan Museum of Art.

After Casey Jones makes himself an wnwanted guest in the Turtles' lair, Raphael takes him topside for a "breath of fresh air", where they encounter the Foot Tech Ninjas.

On a nightly training run, the Turtles and Casey Jones break up a Purple Dragon robbery. One of the perps is Angel, a girl Casey knows from the neighborhood who's going through her initiation rites to become a Purple Dragon.

The boys have made friends with a group of homeless people and are worried when they start mysteriously disappearing into the night!

Oroku Saki (aka the Shredder) attempts to convince Leonardo that Saki is fighting the good fight … that he's out there carrying on the great tradition of Bushido and Ninjitsu, and that the turtles should stand with him.

Our four turtles stand facing their most formidable foe to date … the Shredder.

Believing the Turtles can accomplish so much more for the city, and inspired by iconic superhero Silver Sentry, Michelangelo decides to take a crack at being a superhero.

When Don's examination of some mysterious crystals attracts the attention of a subterranean monster, the Turtles underground exploration unearths a Foot Genetics Lab!

After discovering an abandoned underground Foot Genetics Lab, and being attacked by once-human Digging Creatures, the Turtles assist those very creatures in trying to repair a Force Field.

After befriending the once-human creatures in an abandoned underground Foot Genetics Lab, the Turtles join them on a journey deeper into the earth, where they come upon the ruins of a once-great subterranean city.

With all the turtles living in April's apartment, things are getting a little crazy. But, when Donatello stumbles upon a fantastic monster in the basement, things get crazier.

On a training run Leo is ambushed by a major Foot attack force, including Foot Tech Ninjas, their old enemy Hun, and a new threat: the Foot Elite!

When the Foot Ninja attack April's apartment in force, the Turtles fight against overwhelming odds to get the wounded Leo to safety.

The Turtles, Splinter, Casey and April just barely manage to escape from the explosion that destroys the antique store.

Still recuperating up at Casey's grandmother's farm, the turtles are feeling the sting of boredom.Luckily, a scientist known as the "Monster Hunter" has come to the area searching for a legendary green monster …

The Turtles return to New York (as the title might suggest) with one goal in mind: to destroy the Shredder once and for all.

The Turtles and Splinter continue to fight their way up through the Foot Headquarters skyscraper facing down three misshapen Mutant Shredder Clones.

With Stockman showing up in the middle of the final battle between our heroes and the Shredder, everything is thrown into chaos.

With Splinter mysteriously vanished last episode, the Turtles are feeling frustrated, not knowing where to start looking for him.

After the frustrated Turtles exhaust their search for Splinter, their suspicions turn to the Guardians, and the trail soon leads them to a non-descript building, the initials of its company name spelling out "TCRI".