History Recap / TeenageMutantNinjaTurtles2012S4E25Requiem

* BigNo: Leo lets out one after Shredder tosses Splinter off the Wolf Hotel building.

* ImpaledWithExtremePrejudice: Splinter, when Shredder succeeds in killing him once and for all. Note that this happened before in ''"Annaialation: Earth"'', but was undone by time travel.

* DarkerAndEdgier: As the situation spirals out of control, the heroes resort to outright killing their enemies. Leatherhead ''drowns'' Rahzar, and the party that confronts Shredder atop the Wolf building had every intent of killing him. Casey outright tries to murder the Shredder via garbage truck trash compactor.

* MakeSureHesDead: Shredder does this Splinter after impaling him, by tossing him off the several stories tall building.

* DarkerAndEdgier: As the situation spirals out of control, the heroes resort to outright killing their enemies. Leatherhead ''drowns'' Rahzar, and the party that confronts Shredder atop the Wolf building had every intent of killing him.

* KilledOffForReal: ImpaledWithExtremePrejudice, thrown off the roof, and nothing mystical in the heroes' possession, it is unlikely that Splinter will be brought back to life this time.

* ImpaledWithExtremePrejudice: Splinter, when Shredder succeeds in killing him.
* KilledOffForReal: It is unlikely that Splinter will be brought back to life this time.

* DownerEnding: The Shredder finally succeeds at his goal of killing Splinter, and unlike the last time, [[KilledOffForReal it's unlikely Splinter will be back]], leaving the Turtles without their father, and the Hamato Clan's own attempt to kill Shredder fails, leaving him able to menace them for the finale. Also, Karai has been seriously injured.

* YouCantFightFate: Splinter dies the same way as he did in ''Annihilation: Earth!''; Shredder taking a cheap shot by impaling him from behind, implying this was how he was always destined to die, only the Turtles bought him some time by undoing the previous timeline.

* AttackItsWeakPoint: Subverted. Previously, Super Shredder's weak point was his exposed mutagen heart. However, Stockman-Fly's batch of "super mutagen" proceeded to "stabilize" his condition; the heart is now no longer his weak point, and proved to be impervious to even Karai's sword, which she found out the hard way.

** Casey's crushing of Shredder in the garbage truck after a fall from a rooftop parallels the same action taken at the end of the original live action film. He also says the same line ("Oops."), albeit ''much'' more harshly and bitterly.

* TheDarkSideWillMakeYouForget: Shredder's love for Tang Shen, and her choosing Splinter over him, is his primary reason for turning evil. By this time, he's fallen so far that he no longer seems to care about Tang Shen at all, having absolutely zero qualms against [[SpeakIllOfTheDead mocking Shen's death to Karai's face]] by declaring that it's fitting that Karai will die in a burning building just as her mother did.

* ForgotAboutHisPowers: Karai doesn't attempt to utilize her mutant snake form during her fight with Super Shredder, even though it could have possibly evened the odds, or held him off until backup arrived

* CallBack: At the amusement park, Bebop uses his [[Recap/TeenageMutantNinjaTurtles2012S3E11ThePigAndTheRhino "Turtles, come out and pla-ay!"]] line again, even invoking the trope by name.

* DisneyDeath: Rahzar is dragged helplessly to the bottom of the river by Leatherhead, and Leatherhead surfacing without him and the camera focusing on this implied that Rahzar was killed. In Season 5, it's revealed that he ''did'', in fact, die. [[spoiler:Though Kavaxas brings him back to life.]]

* DarkerAndEdgier: As the situation spirals out of control, the heroes resort to outright killing their enemies; the party that confronts Shredder atop the Wolf building had every intent of killing Shredder.

* FamilyUnfriendlyDeath: Splinter is impaled on-screen, and then, for good measure, thrown off a building.

* DisneyDeath: Rahzar is dragged helplessly to the bottom of the river by Leatherhead, and Leatherhead surfacing without him and the camera focusing on this implied that Rahzar was killed. However, he turns up in Season 5 seemingly no worse for wear.

* CallBack: At the amusement park, Bepop uses his [[Recap/TeenageMutantNinjaTurtles2012S3E11ThePigAndTheRhino "Turtles, come out and pla-ay!"]] line again, even invoking the trope by name.

* AttackItsWeakPoint: Subverted. Previously, Super Shredder's weak point was his exposed mutagen heart. However, Stockman-Fly's batch of "super mutagen" proceeded to "stabilize" his condition, the heart is now no longer his weak point, and proved to be impervious to even Karai's sword, which she found out the hard way.

* BishounenLine: Averted. Super-Shredder's "stabilized" form is identical to before, apart from the blades emerging from him being slightly longer and his eyes not glowing anymore.