Raphael's pet turtle, Spike, is exposed to mutagen and changes into a hulking brute. He then sets out on a vendetta against Raph's brothers.
When Piper Chapman is forced to swap her privileged lifestyle as a public relations executive for 12 months in a minimum-security prison, she quickly finds it is easy to make enemies.
After insulting the prison chef and suffering the consequences, Piper must come up with an acceptable form of apology.
Piper finds that gently turning down an inmate's romantic advances fails to have the desired effect.
Piper learns more about her new roommate Claudette and a missing screwdriver has the guards on alert. Elsewhere, one inmate prepares to leave.
Piper gives Larry cause to worry about her becoming too absorbed in her prison routine when she spots a legendary feral chicken.
As elections are held in the prison for places on the council, Piper attempts to avoid the racial campaign polarisation.
Piper tries to get the prison track reopened but has difficulty getting Healy on board. Meanwhile, we learn how Watson ended up in prison by looking at her promising past. Larry struggles over writing an article about Piper, the guards search for a smuggled cell phone, and Mendez tangles with Red.moreless
Larry writes an article about Piper and Red smuggles drugs into the prison. Meanwhile, two babies are born.
Piper's inappropriate behavior sees her in solitary over Thanksgiving, preventing Larry from seeing her.
Some delinquent teenagers are the subject for reform by the inmates and Pornstache suffers a setback in his side-business. Meanwhile, Pennsatucky learns a new skill.
While Larry is interviewed on the radio, the prisoners mourn a recently departed inmate.
Pennsatucky feels disrespected by Piper and Larry gives her an ultimatum.
The prison inmates organize a Christmas pageant and Piper realizes that her life is in danger. Meanwhile, Red's attempt to retake her kitchen does not go to plan.
Baxter Stockman traps the Turtles in a maze with Fishface and Dogpound.
The Turtles go all out to stop the Kraang invasion for a final time.
The Turtles come face to face with a wannabe hero known as The Pulverizer.
When April's science project attracts the Kraang's attention, the turtles must step in to save the day.
While Raphael takes a turn leading the group, Leonardo ventures elsewhere and meets Karai, a female ninja with dark secrets.
The Turtles have their hands full when a new foe named The Rat King plans on taking over New York City. Unfortunately, The Rat King is also planning on controlling Splinter's mind.
Michelangelo befriends 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.
When their home is attacked by Bradford, the Turtles must step up and defend the only home they've ever known.
The Turtles spring into action when April receives a distressing phone call from her father. Now it's up to the team to stop the Kraang from detonating a bomb in the city.
Leonardo struggles with his past when an old enemy, Xever, comes back to attack a noodle shop.
While searching for a missing scientist, Donnie and April find a psychic monkey instead.