Jason Biggs
Leonardo (voice)
Series SeasonSeason 1 episodes2012
Teenage Mutant Ninja Turtles
Season 1
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.
Episodes
Each episode has its own detail page.
Episode 123 min2012-09-28
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...
Episode 225 min2012-09-29
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.
Episode 323 min2012-10-06
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.
Episode 423 min2012-10-13
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.
Episode 523 min2012-10-20
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.
Episode 623 min2012-10-27
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.
Episode 723 min2012-11-03
Monkey Brains
Donatello and April investigate a scientist’s disappearance, but discover a conspiracy regarding a bizarre psychic monkey instead.
Episode 823 min2012-11-10
Never Say Xever
Leo fears his act of mercy has come back to haunt him when Xever holds a local noodle shop owner hostage.
Episode 923 min2012-11-17
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.
Episode 1023 min2012-11-24
Panic in the Sewers
The Turtles must defend their home in the sewers when Chris Bradford tries to destroy it with a dangerous chemical.
Episode 1123 min2012-12-08
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.
Episode 1223 min2012-12-15
It Came From the Depths
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 friend or a foe.
Episode 1323 min2013-01-25
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.
Episode 1423 min2013-02-01
New Girl in Town
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 from the group, Leonardo meets a female Foot Ninja named Karai, who tries to lure him to the dark side.
Episode 1523 min2013-02-08
The Alien Agenda
The Turtles get their first look at high school when April's school project draws attention from the Kraang.
Episode 1623 min2013-02-15
The Pulverizer
The Turtles meet their first fan when a teenager decides to dress up and fight crime as "The Pulverizer."
Episode 1723 min2013-03-01
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.
Episode 1823 min2013-03-15
Cockroach Terminator
While trying to foil a Kraang invasion plot, the Turtles are hunted by a giant cockroach.
Episode 1923 min2013-04-05
Baxter's Gambit
Baxter Stockman seeks revenge on Fishface and Dogpound as well as the Turtles, and lures them all into a deadly labyrinth.
Episode 2023 min2013-04-12
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.
Episode 2123 min2013-04-27
Karai's Vendetta
While the Turtles are infiltrating an undersea Kraang base, the Foot Clan attempts to capture April.
Episode 2223 min2013-05-11
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.
Episode 2323 min2013-07-20
Parasitica
Michaelangelo must fight his brothers when they fall under the control of a parasitic wasp.
Episode 2423 min2013-07-27
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.
Episode 2523 min2013-08-08
Showdown (1)
The turtles engage in a difficult battle, as they make a desperate assault on TCRI to shut down the Kraang portal.
Episode 2623 min2013-08-08
Showdown (2)
With the world at stake, the only thing of importance is that the Turtles complete their mission. No matter what ...