Rise of the Turtles
Season 1Episode 1
On their first trip to the surface, the Turtles witness April O'Neil and her father Kirby get abducted by the Kraang. Donnie convinces the others that it is their duty to rescue the O'Neils, even if it means battling the giant plant mutant "Snakeweed."
Season 1Episode 2
During a fight with the Kraang, Raphael loses his temper when he is insulted by a caustic New Yorker named Vic who videotaped the Turtles and threatens to expose them to the world. When three of the Ninja Turtles try to rescue Vic from the Kraang, the Ninja Turtles' attempt to rescue him and get rid of the footage goes horribly wrong when Vic is mutated into the spider-like mutant Spider Bytez
New Friend, Old Enemy
Season 1Episode 3
To prove that Turtles can be friends with humans, Michelangelo uses a social networking site to befriend Chris Bradford, a famous martial artist who is secretly Shredder’s top lieutenant. Shredder has assigned Chris Bradford to work with Xever in order to find Splinter.
I think his name is Baxter Stockman
Season 1Episode 4
Splinter grounds the Turtles for a week because Michelangelo was skateboarding in the lair. When the Turtles sneak out against Splinter's orders, they battle Baxter Stockman who plans revenge on TCRI after they fired him for an incident revolving around spilt copier toner
Season 1Episode 5
Weary of using his simple bō to fight the technologically-advanced Kraang and his rokushakubo breaks during battle, Donatello creates Metalhead (a remote-controlled robot turtle reverse-engineered from Kraang technology) to fight in his place. When Metalhead malfunctions and falls under the control of the Kraang, Donatello must find a way to stop Metalhead.
Season 1Episode 6
After teaming up to investigate the disappearance of local scientist named Dr. Tyler Rockwell, April and Donnie encounter a bizarre psychic monkey creature. They come to realize that Rockwell's colleague Dr. Victor Falco knows more than he is willing to tell.
Never say Xever
Season 1Episode 7
Following a fight with the Purple Dragons at a noodle shop, Leo fears his act of mercy has come back to haunt him when Xever, Chris Bradford, the Purple Dragons, and the Foot Ninjas hold the blind local noodle shop owner Mr. Murakami hostage.
Season 1Episode 8
After April receives a warning from her imprisoned father which arrived on a mutant pigeon named Pete, she and the Turtles embark on a mission to save him and stop the Kraang from detonating a mutagen bomb in the city. But the Turtles aren't prepared for anything when the Shredder makes his move on them and an accident at the Kraang's hideout involving a leaking mutagen container transforms Chris Bradford and Xever into Dogpound and Fishface.
Panic in the sewers
Season 1Episode 9
Following a nightmare involving Shredder, Splinter ends up putting the Ninja Turtles in training 24/7. The Ninja Turtles soon defend their home in the sewers when Shredder orders Dogpound and the Purple Dragons to destroy it with chlorosulfonic acid (a dangerous chemical that reacts badly to water).
Season 1Episode 10
Simultaneous threats from the Purple Dragons and from Baxter Stockman's mechanical M.O.U.S.E.R.S. force the Turtles to split into two groups. Donnie and Mikey are determined to prove that their “B Team” is just as valuable as Leo and Raph’s “A Team". But after Stockman and the Dragons team up with Dogpound, the four Turtles work together to defeat them.
It came from the depths
Season 1Episode 11
After the Turtles rescue an anger-prone mutant alligator from the Kraang, Mikey nurses him back to health and befriends him. The Turtles learn that the mutant alligator Leatherhead possesses a piece of Kraang technology that must never be returned to them.
Season 1Episode 12
The Turtles must save the city and Splinter's mind from Dr. Victor Falco, who is now the terrifying Rat King.
New girl in town
Season 1Episode 13
Tired of Raphael's constant criticism while trying to stop Snakeweed's people abduction plot, Leonardo lets him try his hand at leadership. Leonardo meets a female Foot Ninja named Karai who tries to lure him to the dark side.
The Alien Agenda
Season 1Episode 14
Leo and Raph fight over whether or not they can trust Karai. The Turtles get their first look at high school when April's school project draws attention from the Kraang. Karai learns about the existence of the Kraang and tries to tell Shredder, but he is uninterested until he thinks their technology can work to his benefit.
Season 1Episode 15
While taking the Shellraiser for a test drive, the Turtles meet their first fan, a teenager dressed up to fight crime as "The Pulverizer". Baxter Stockman perfects a pair of cybernetic legs for Fishface using stolen Kraang technology, and the Kraang search for their lost power cell.
Season 1Episode 16
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.
Season 1Episode 17
While trying to foil a Kraang plot to drill into the Earth's core, Donatello's spy cockroach becomes accidentally mutated. When the Turtles find it, they learn that Spyroach is targeting Raphael, who ironically, is afraid of cockroaches.
Season 1Episode 18
Following a three-way fight between the Turtles, the Foot, and the Kraang, Baxter Stockman convinces Shredder to let him use a full-proof plan. His true intentions with the plan involve seeking revenge on the Turtles (who have been foiling his plans) and Dogpound and Fishface (who have been abusing and threatening him) by luring them all into a deadly labyrinth called the Maze of Doom. Now the Turtles, Dogpound, and Fishface must form a temporary truce to get out of the Maze of Doom alive. Meanwhile, Splinter works to find the right weapon for April as she learns more about Splinter's past.
Enemy of my Enemy
Season 1Episode 19
When a Kraang invasion scheme threatens to destroy the Turtles and put the whole world in danger, Karai offers an alliance with the Turtles. After declining Karai's offer, the Turtles eventually decide that teaming up with Karai might be a good idea when Karai mentions weapons that are being shipped to the Shredder that she could steal. However, when the Turtles plan on destroying the Shredder once and for all, Karai's loyalty to the Turtles vanishes and now the Turtles must deal with Shredder and Karai as well as the Kraang.
Season 1Episode 20
After the Turtles discover a Kraang plot to turn Earth's water into Kraang water, they infiltrate an undersea Kraang base guarded by a sea creature from Dimension X. Shredder interrogates a captured Kraang droid and learns that April is not only an ally of the Turtles, but the key to the Kraang's ability to take over Earth. Shredder sends Karai to capture her, but April applies her ninjutsu skills to get away.