Teenage Mutant Ninja Turtles (1987 TV series) season 1

New York City is experiencing a crime wave. Reporter April O'Neil discovers the thieves are ninja. As a street gang attacks April, she escapes into the sewers, where four big talking turtles defeat the thugs, and take April to their lair. There April meets their mentor, a rat Splinter, who tells her his backstory as the Japanese ninja Hamato Yoshi. As the Turtles and April investigate the streets for the thieves' origins, they discover a group of robot ninjas whose uniform Splinter recognizes as belonging to the Foot Clan. Before April can expose them, she's kidnapped by the Shredder. The Turtles race to free her.

• First appearances of Leonardo, Donatello, Raphael, Michaelangelo, April O'Neil, Master Splinter, Shredder, Bebop and Rocksteady, Burne Thompson and Vernon Fenwick.

Foot Clan leader Oroku Saki, the Shredder decides, along with his partner Krang from Dimension X to turn two thugs into mutant henchmen using the mutagen that created Splinter and the TMNT. Thus two members of the street gang, Bebop and Rocksteady are respectively mutated into a warthog and a rhino. The Foot Soldiers kidnap Splinter, and the Turtles go rescue him at the Technodrome.

Notes: First appearances of Krang and the Technodrome. The image used during the end credits for seasons one through three is taken from this episode; specifically at 03m 19.8s, when April sees the Technodrome drilling through the ground.

• In a "Shellshocked" podcast interview David Wise revealed that the Technodrome (described as a city on tank threads in the script) was inspired by the mothership from "Close Encounters of the Third Kind".

The Shredder hires the scientist Baxter Stockman, because his invention, rat-seeking robots named Mousers, can help him find Splinter. After an initial Mouser attack, the Turtles and Splinter hide in April's apartment.

• First appearance of Baxter Stockman.
• According to Fred Wolf this episode was animated in South Korea.

Shredder opens the portal to Dimension X for the first time. Three teenage kids known as Neutrinos and two of Krang's stone warriors emerge. The turtles befriend the teens, but before long the two stone warriors set up a special weather making device that causes trouble.

• First appearances of The Neutrinos (Kala, Dask, and Zak), General Traag and the Turtle Van.

Shredder transmits a message to the turtles showing off a retromutagen gun that could turn Splinter back into a human. When Splinter goes after the gun Shredder then has completed Krang's new body and puts him in it. Then after the Turtles come to help Splinter they have to deal with Krang and his new body. Then after the turtles defeat Krang and Splinter destroys that retromutagen gun to save the turtles Shredder and Krang try to open the portal again. Donatello reverses the polarity causing the entire Technodrome to be pulled into Dimension X.

Notes: First appearances of Krang's android body and the Turtle Blimp. Final episode where Vernon Fenwick is voiced by Pat Fraley.

• According to the storyboard, the episode's title is supposed to be "Shredded & Splintered"
• In an interview with Comics Scene magazine, Peter Laird and Kevin Eastman revealed that the original premise of the episode had Shredder becoming Krang's new body. They vetoed it as they felt it would take away each character's uniqueness. Another thing that was changed is turtles befriending Baxter Stockman and claiming the Technodrome for themselves after defeating Krang/Shredder.