History NightmareFuel / TeenageMutantNinjaTurtles2003

** The ending of "Good Genes, Part 2". It turns out that the relic that Bishop wanted was keeping the REAL SHREDDER'S HERALDS chained as Foot mystics, and now they are free. To say that [[NiceJobBreakingItHero both sides had messed up]] doesn't even begin describe it. We learn there is a "true" Shredder who is going to be resurrected, and the
-->'''Foot Mystics''': The crystal is destroyed, and with it, Karai's hold over us. She thought because we could not touch it, she was safe... but now it is dust. And we are '''free!''' Free to resurrect the ''true'' Shredder! And a new age of chaos shall begin!

** So much that it was taken off air. For starters, Stockman's new body starts to [[BodyHorror melt]]. And blood and flesh are apparently visible, and he later starts hitting his own arm with a hammer and a nail. Although he attempts to study and repair himself through a mixture of reattaching his diseased limbs and cybernetic prosthetics, his efforts end in failure. Driven to [[SanitySlippage desperation and madness,]] Stockman attempts to trace back to the source of his trouble. First, the punishments at the hands of the Shredder and Hun, then the humiliating defeats at the hands of the Turtles. Then he finds what he believes to be the source of his troubles: April O'Neil. Stockman believes that if April had not run off and met the Turtles, the Mouser program would not have failed, and the Shredder would not have tortured Stockman. Filled with anger and revenge, Stockman jumps to the helicopter and uses it to fly to the New York City where he can get his revenge on April O'Neil!

* '''THE SHREDDER.''' Everything about him. He is one of the rare cases of a cartoon villain that makes good on his promise to [[YouHaveFailedMe punish someone for their failures]]. So you failed him? Killing you will be the more ''merciful'' option. Ch'rell is also an AxCrazy OmnicidalManiac who is also a skilled fighter.

This iteration of the turtles is interesting, for one it was produced by [[Creator/FourKidsEntertainment 4kids]], a company who was notorious for its heavy censorship and editing practices. And second, it is the first and currently only animated adaptation to be faithful to the [[ComicBook/TeenageMutantNinjaTurtlesMirage original comics]]. While the show still did its best balancing out these aspects, it still manages to get away with a lot of dark and disturbing moments, even for a kids show, with few exceptions - one of which was an episode full of so much BodyHorror that it was taken off the air.