Vengeance is Mine

Vengeance is Mine is the 48th episode and second season finale of the 2012 Series. It is set to air on June 29, 2014.

Synopsis
Leo stages a rescue for Karai against Splinter's wishes. But when Karai is back Splinter is happy but she wants revenge against Shredder. So she goes but she gets captured and then mutated into a mutant Snake.

Major Characters

 * Donatello (Rob Paulsen)
 * Leonardo (Dominic Catrambone)
 * Michelangelo (Greg Cipes)
 * Raphael (Sean Astin)
 * Karai (Kelly Hu)
 * Shredder (Kevin Michael Richardson)
 * Splinter (Hoon Lee)
 * Tiger Claw (Eric Bauza)

Minor Characters

 * Stockman-Fly
 * Chrome Dome
 * Fishface (Christian Lanz)
 * Foot-Bots
 * Rahzar (Clancy Brown)
 * Tang Shen (cameo)

Plot
The episode starts with Fishface bringing some food to Karai. She makes fun of him because he's not in charge and follows Tiger Claw's orders. When he leaves, Karai finally breaks a prison bar and tries to escape. However, Tiger Claw grabs her and they fight. Karai gets knocked out and as Tiger Claw wants to slay her, Shredder enters and orders him to stop. Karai wakes up chained and Shredder tells her that everything he has done was for the clan's honor and calls her daughter. Karai yells that she's not his daughter.

In the lair, guys try to figure out a plan for saving Karai, however, they don't all agree. Splinter tells Leo that a plan that leaves to confrontation with the Shredder is doomed to failure. Leo says that it is worth it to save Karai. Donnie is left in the Shellraiser to monitor the situation and turns of the power for Shredder's tower. Mikey distracts Rahzar and Fishface with his shadow skills and Leo and Raph sneak in from the sewers and free Karai. Tiger Claw appears and he attacks them. While Mikey knocks out Fishface and Rahzar who scratches his arm, Donnie uses a dog whistle to drive Tiger Claw crazy. Leo, Raph and Karai escape and find Mikey. Then, tons of Foot-Bots appear along with Tiger Claw. Donnie uses the dog whistle to distract Tiger Claw and drives over a few Bots and they escape after a chase.

The Turtles and Karai return to the lair and Raph wraps up Mikey's arm. Splinter asks what happened, only to see his daughter again. She hugs him and Leo says that his plan worked. Tiger Claw returns to Shredder and tells him a few Foot-Bots are still searching for them. Shredder says that he counted on Karai's escape and tells Tiger Claw to bring him Baxter Stockman. In the lair, the Turtles are training as Splinter and Karai observe. Mikey easily avoids all of Leo's attacks and throws a water balloon at his face. To impress Karai, he jumps at Mikey and they roll over Donnie and Raph joins them. The Turtles leave and Karai asks Splinter what happened with him, Shredder and her mother.

Splinter tells Karai of the history between both the Hamato and the Foot and that once Oroku Saki discovered his true origins with the Foot, and discovered that Hamato Yoshi and Tang Shen were together, he sought to revive his true clan and kill Hamato Yoshi, killing Tang Shen by accident and then blaming his rival, burning the house to the ground while taking his only daughter with him.

Angered, Karai suggests that they take the fight to the Shredder but Splinter merely states that being reunited is enough for him. That night, Leo catches Karai trying to sneak out to go after the Shredder by herself and says he wants to go with her. Karai knocks Leo out and continues on her own. When Leo wakes up, he tells everyone what happened and Splinter blames himself for telling her too much too soon.

Karai attempts to murder Shredder in his throne only to discover Chrome Dome waiting instead. Shredder admits that Karai returned sooner than he expected and shortly defeats her in battle before ordering Tiger Claw to bring her to Stockman's lab, the turtles and Splinter, quietly following behind them.

Stockman finishes mixing some DNA when the Shredder arrives with the foot and Karai, explaining that she would be used as bait in order to capture the turtles and mutate them into mindless snakes to use against Splinter, breaking his spirit and then his body. Splinter and the turtles arrive and begin battle. Mikey, Raph and Donnie quickly get trapped in spring loaded cages, while Leo uses his sword to break free of his. Leo manages to reach Karai, only for Shredder to swipe at him, missing him and cutting the chain, watching helplessly as Karai falls into the mutagen, transforming her into a mutant snake. Shredder blames Splinter for what happens but gets blocked off by debris as the building catches on fire. Tiger Claw assures him that they will get revenge and the foot escapes.

Karai wraps around Splinter intent on killing him when she stops, calling him father before leaving. Splinter and the turtles escape the building and watch it burn before Splinter tells it's time to return home. Elsewhere, Karai changes back into human form with green eyes and fangs.

Gallery
Vengeance is Mine/Gallery

Trivia

 * When Michelangelo is scratched by Rahzar in Slow Motion he expresses his pain by saying "TO... KKA..." as a reference to Rahzar's partner in previous incarnations.
 * Karai has serpent heads instead of hands, much like the character Scale Tail, a mutant snake from the Playmates 1987 toyline.
 * Michelangelo hums the 1987 cartoon theme song in two different occasions in this episode, the first one being when distracting Rahzar and Fishface and he second one after hitting Leonardo with a water baloon.
 * Baxter has bug like spikes coming out from his limbs and torso in this episode that were not in previous ones were Baxter appears as a fly.