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Season guide

Teenage Mutant Ninja Turtles: Season 1

26 episodes Premiered Sep 28, 2012 Updated Jul 20, 2026

The first season of the animated television series Teenage Mutant Ninja Turtles aired on Nickelodeon from September 29, 2012, to August 8, 2013. This iteration of the franchise was developed for television by Ciro Nieli, Joshua Sternin, and Jennifer Ventimilia. The series is based on the original Teenage Mutant Ninja Turtles characters created by Kevin Eastman and Peter Laird. The narrative centers on four turtles na

Season overview

The first season of the animated television series Teenage Mutant Ninja Turtles aired on Nickelodeon from September 29, 2012, to August 8, 2013. This iteration of the franchise was developed for television by Ciro Nieli, Joshua Sternin, and Jennifer Ventimilia. The series is based on the original Teenage Mutant Ninja Turtles characters created by Kevin Eastman and Peter Laird. The narrative centers on four turtles named Leonardo, Donatello, Raphael, and Michelangelo. In this series, the turtles emerge from their sewer home for the first time on their fifteenth birthday. Upon surfacing, they discover that life above ground is different from what they had anticipated. The show is categorized as an action, adventure, comedy, and science fiction fantasy program. It aims to combine the established history of the comic book origins with new elements. This production marks a return of the characters to an animated series format on the Nickelodeon network. The series is part of a larger franchise that has been adapted across various media platforms.

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Episodes

S1·E1

Rise of the Turtles (1)

Sep 28, 2012 · 23 min

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 f

S1·E2

Rise of the Turtles (2)

Sep 29, 2012 · 25 min

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.

S1·E3

Turtle Temper

Oct 6, 2012 · 23 min

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

S1·E4

New Friend, Old Enemy

Oct 13, 2012 · 23 min

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.

S1·E5

I Think His Name Is Baxter Stockman

Oct 20, 2012 · 23 min

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

S1·E6

Metalhead

Oct 27, 2012 · 23 min

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

S1·E7

Monkey Brains

Nov 3, 2012 · 23 min

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

S1·E8

Never Say Xever

Nov 10, 2012 · 23 min

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

S1·E9

The Gauntlet

Nov 17, 2012 · 23 min

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.

S1·E10

Panic in the Sewers

Nov 24, 2012 · 23 min

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

S1·E11

Mousers Attack!

Dec 8, 2012 · 23 min

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”

S1·E12

It Came From the Depths

Dec 15, 2012 · 23 min

Michelangelo befriends Leatherhead, an unstable mutant alligator who possesses a strange piece of Kraang technology, but the other Turtles aren’t sure whether Leatherhead is a frie

S1·E13

I, Monster

Jan 25, 2013 · 23 min

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.

S1·E14

New Girl in Town

Feb 1, 2013 · 23 min

Snakeweed returns and begins abducting people. Tired of Raphael's constant criticism while trying to stop Snakeweed, Leonardo lets Raphael try his hand at leadership. While away fr

S1·E15

The Alien Agenda

Feb 8, 2013 · 23 min

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

S1·E16

The Pulverizer

Feb 15, 2013 · 23 min

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

S1·E17

TCRI

Mar 1, 2013 · 23 min

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.

S1·E18

Cockroach Terminator

Mar 15, 2013 · 23 min

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

S1·E19

Baxter's Gambit

Apr 5, 2013 · 23 min

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

S1·E20

Enemy of My Enemy

Apr 12, 2013 · 23 min

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.

S1·E21

Karai's Vendetta

Apr 27, 2013 · 23 min

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

S1·E22

The Pulverizer Returns!

May 11, 2013 · 23 min

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 i

S1·E23

Parasitica

Jul 20, 2013 · 23 min

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

S1·E24

Operation: Break Out

Jul 27, 2013 · 23 min

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.

S1·E25

Showdown (1)

Aug 8, 2013 · 23 min

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

S1·E26

Showdown (2)

Aug 8, 2013 · 23 min

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