The first season of Teenage Mutant Ninja Turtles aired on Nickelodeon from September 29, 2012 to August 8, 2013. The season introduces four turtles, Leonardo, Donatello, Raphael and Michelangelo.

Release Date

Premiered

Teenage Mutant Ninja Turtles Season 1 released on September 28, 2012.

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Episodes

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S01E01 Aired September 28, 2012

Rise of the Turtles (1)

For fifteen years, four mutant Turtles and their rodent sensei have lived a secret life beneath the sewers of New York. Coming to the surface for the first time, the Turtles soon find their day out interrupted as a young girl and her father become the targets of mysterious, and dangerous, men...

S01E02 Aired September 29, 2012

Rise of the Turtles (2)

When April O'Neil is abducted, the Turtles search leads to the base of the robotic Kraang army, and Leonardo struggles to unify his rebellious brothers to victory.

S01E03 Aired October 06, 2012

Turtle Temper

The Turtles are in danger of exposure when hot-headed Raphael is caught on video arguing with a human on the street. He must learn to control his temper in order to help the others retrieve the video before it falls into the wrong hands.

S01E04 Aired October 13, 2012

New Friend, Old Enemy

To prove that Turtles can be friends with humans, Michelangelo uses a social networking site to befriend a famous martial artist who is secretly Shredder's top lieutenant.

S01E05 Aired October 20, 2012

I Think His Name Is Baxter Stockman

When Donatello's latest invention gives failed inventor and perpetual loser Baxter Stockman enhanced abilities, the turtles must learn to use their heads instead of brute force to defeat him.

S01E06 Aired October 27, 2012

Metalhead

When Donatello loses confidence in his bo staff as an effective weapon, he constructs Metalhead, a fully armed robotic turtle based on Kraang technology.

S01E07 Aired November 03, 2012

Monkey Brains

Donatello and April investigate a scientist’s disappearance, but discover a conspiracy regarding a bizarre psychic monkey instead.

S01E08 Aired November 10, 2012

Never Say Xever

Leo fears his act of mercy has come back to haunt him when Xever holds a local noodle shop owner hostage.

S01E09 Aired November 17, 2012

The Gauntlet

After April receives a warning from her imprisoned father, she and the Turtles embark on a mission to save him and stop The Kraang from detonating a mutagen bomb in the city.

S01E10 Aired November 24, 2012

Panic in the Sewers

The Turtles must defend their home in the sewers when Chris Bradford tries to destroy it with a dangerous chemical.

S01E11 Aired December 08, 2012

Mousers Attack!

When simultaneous threats from the Purple Dragons and Baxter Stockman’s mechanical Mousers force the Turtles to split into two groups, Donnie & Mikey must prove that their “B Team” is just as valuable as Leo & Raph’s “A Team.”

S01E12 Aired December 15, 2012

It Came from the Depths

Michelangelo befriends an unstable mutant alligator, who he later names Leatherhead, possesses a strange piece of Kraang technology, but the other Turtles aren’t sure whether Leatherhead is a friend or a foe.

S01E13 Aired January 25, 2013

I, Monster

The Turtles must face off against a new enemy, The Rat King, who threatens not only to take control of the city, but of Splinter's mind as well.

S01E14 Aired February 01, 2013

New Girl in Town

Tired of Raphael's constant criticism, Leonardo lets him try his hand at leadership, while Leonardo meets a female ninja, Karai, who tries to lure him to the dark side.

S01E15 Aired February 08, 2013

The Alien Agenda

The Turtles get their first look at high school when April's school project draws attention from the Kraang.

S01E16 Aired February 15, 2013

The Pulverizer

The Turtles meet their first fan when a teenager decides to dress up and fight crime as "The Pulverizer."

S01E17 Aired March 01, 2013

TCRI

While breaking into the hostile environment of TCRI headquarters, the Turtles discover the true intent of the Kraang and resolve to stop the alien invasion once and for all.

S01E18 Aired March 15, 2013

Cockroach Terminator

While trying to foil a Kraang invasion plot, the Turtles are hunted by a giant cockroach.

S01E19 Aired April 05, 2013

Baxter's Gambit

Baxter Stockman seeks revenge on Fishface and Dogpound as well as the Turtles, and lures them all into a deadly labyrinth.

S01E20 Aired April 12, 2013

Enemy of My Enemy

After witnessing the Kraang in action, Karai realizes the seriousness of the alien threat and proposes an alliance with the Turtles....unless the Shredder finds out.

S01E21 Aired April 27, 2013

Karai's Vendetta

While the Turtles are infiltrating an undersea Kraang base, the Foot Clan attempts to capture April.

S01E22 Aired May 11, 2013

The Pulverizer Returns!

When Shredder plans to create an army of mutants, the Turtles must rely on the help of the Pulverizer, who was recruited into the Foot (to be expendable) and volunteers to gather information on the inside on their behalf. When he agrees to be a test subject for a stolen supply of Kraang Mutagen, the Turtles rescue him, but not before he recklessly gets himself mutated.

S01E23 Aired July 20, 2013

Parasitica

Michaelangelo must fight his brothers when they fall under the control of a parasitic wasp.

S01E24 Aired July 27, 2013

Operation: Break Out

Donatello breaks into a secret Kraang detention center in order to rescue Kirby O'Neil, but ends up trapped inside with a deadly prisoner called the Newtralizer.

S01E25 Aired August 08, 2013

Showdown (1)

The turtles engage in a difficult battle, as they make a desperate assault on TCRI to shut down the Kraang portal.

S01E26 Aired August 08, 2013

Showdown (2)

With the world at stake, the only thing of importance is that the Turtles complete their mission. No matter what ...