[Episode starts at the Shredder's lair, where the Shredder closes his eyes, laments about Karai's mutation as he has every moment with her. In a memory, he gifted Karai a tanto when she was younger.]
Shredder:[scene in flashbacks] You have done well, my daughter. You have made me proud. [then there was the scene where Karai mutated] Karai!
Tiger Claw: Master Shredder, [Shredder open his eyes to face Tiger Claw, who’s kneeling before him.] the hour grows late. Have you made your decision?
Shredder: They are dangerous allies. But they have provided us with much technology, asking little in return.
Tiger Claw: They will betray you. You know this. They care nothing for the human race.
Shredder:[Leaning in.] Nor do I. Leave me, Tiger Claw.
[As Tiger Claw leaves, Shredder looks down with sadness until a Kraang droid head pops outs and projects a hologram screen of the Kraang's leader, Kraang Prime.]
Shredder: Kraang Prime.
Kraang Prime: One called Shredder. Kraang must have your decision.
Shredder: If I help you, will you uphold your end of the bargain?
Kraang Prime: Kraang will deliver the ones called Splinter and the Turtles.
Shredder: And once I find Karai, you will mutate her back to normal?
Kraang Prime: Kraang agrees to this. But in return, Shredder must then help Kraang conquer the city known as New York City. And then the world!
[theme song]
[In New York, April and Irma are walking down the street as snowflakes fall.]
Irma: It's just that, why can't you introduce me to your secret friends, April? I don't get it.
April: One of these days, Irma. uhm. maybe. They're really good, uhm, people. Anyway, what I wanna know is, how can you go out in this weather without a coat?
Irma: Eh, I hardly ever notice the cold. But seriously, if we're friends, friends should introduce friends to friends and-
[The Footbots arrive, causing Irma to stop talking.]
April: [alarmed] Footbots!!
Irma: These aren't the types of friends I meant!
April: Move, Irma! Run!
[They begin to run as the footbots chase them. April tries to call Donnie but a ninja star struck it.]
April: No!
Irma: Who are these freaks, April?
April: Doesn't matter! Run!
[Meanwhile. Raph is on the rooftop, scanning with a periscope.]
Raph: Where are you? You gotta be out there somewhere.
[Casey is in the alley, taking pictures. Raph jumps down.]
Raph: Casey! We're supposed to be looking for Karai! What are you doing, man?
Casey: [offended] Hey, I'm just taking a break, peeping some awesome art. Check it out! That is so metal!
Raph: Yeah, great. Come on, Casey. Let's move.
Casey: So hold up, Raph. Uh, got a question for ya. So, uhm, April ever talk about me? Like ever?
Raph: It doesn't matter. You know how Donnie feels about her.
Casey: Yeah, yeah, it's cool. When you've got that man/woman thing going on in a team, it just screws everything up. I'm not that into her anyway.
Raph: [looks at the graffiti drawing] Right.
[Meanwhile in the lab. Leo is pacing around while Donnie didn't even eat his pizza.]
Donnie: Ah! I'm so worried, I can't even eat.
[He tosses away a pizza which Mikey catches.]
Mikey:[mouthful] Me too, totally.
Splinter: You have a right to be concerned. The Kraang invasion is imminent. What plans have you devised to stop it?
Donnie: I give you my latest invention, [pulls out his blueprint] the Turtle Mech! It's fully armed with rockets, flame throwers, and an electro harpoon. Guaranteed to stop a massive Kraang invasion army, or your money back.
[While Mikey is content with this idea, Leo looks displeased.]
Mikey: [Excitedly.] Giant robots are awesome! I vote Turtle Mech!
Leo: [Displeased.] But that thing's not even ready. It could damage New York more than help it.
Donnie: It's ready..... enough.
Leo: There's gotta be another way. We need to establish a second base outside the city.
Donnie: [Stubbornly.] There is no time for that, Leo. The Turtle Mech is solid. If I were leader, I'd -
[Leo leans to Donnie.]
Leo: [A bit selfishly.] But you're not leader, Donnie! I am.
[Leo and Donnie glare at each other angrily, fractured by their sharing disagreement over how to stop the invasion.]
Mikey: Oh, snap.
Splinter: [Sternly.] Enough! Your egos fight one another when we should be preparing to fight the Kraang.
[Meanwhile, April and Irma continue running from the bots.]
April: Faster, Irma! Move those little legs!
Irma: I'm moving! I'm moving!
April: This way!
[They turn around a corner and stop in an alley.]
Irma: A dead end! It's the end and we're dead.
April: Not yet.
[The footbots look around as Irma and April hide. They sneak past as April lead Irma to the manhole cover.]
April: Quick. Down here.
[She opens the manhole cover and climbs down the ladder.]
Irma: You're not serious. Oh, you are serious. [becoming disgusted] Ugh, the smell is making my sinuses melt.
[They both enter the sewers. Meanwhile, Raph sees Karai slithering by in a distance.]
Casey: Aw, sweet. This is so cool.
Raph: Casey, I see her! Karai! She's slithering across the stree-
[They see a police car coming.]
Casey: Great. Eh, can I help you, officers?
Police officer: [Strictly.] You're loitering, kid. You know what that means?
Casey: [Smiles.] Loitering? Seriously? Don't you got real criminals to bust? Or a donut shop to go to?
Police officer / Jim: We'll figure out a charge later, Casey Jones.
Casey: How do you know my name? [officers grab him and drag him away to their car, causing Casey to protest.] Hey, get off of me! I got rights! Let me go!
[Cut back to the lair. Donnie tries in vain to convince Leo to allow his Turtle Mech plan.]
Donnie: Leo, the Turtle Mech is our only answer! Be reasonable!
Leo: I am being reasonable! We need a second base, Donnie. Period.
[April arrives at the lair. Irma trips and loses her glasses.]
April: Guys! I'm sorry about this. But... but... but... Footbots were after us, and Irma here is really good at keeping secrets, and, um...
Splinter: [Furious.] April, you have brought a stranger? here?
April: [while getting Irma's glasses and putting them on Irma's face] Don't worry, Master Splinter. She's cool. Right, Irma?
[Irma looks up after dusting herself and became shocked.]
April: Irma?
Irma: [shocked] T-t-t- Turtles?
Mikey: What up, dog?
Irma:[twitching.] Turtles... Derp...
[Irma was not acting like herself now...]
Leo: Miss, I know we look kind of different and all, but I promise, we're not gonna hurt you.
[April stepped away as Irma twitched. Something strange started to happen. Irma's head started to rise up, revealing a metal neck.]
Mikey: Holy chalupa!
[Mikey throws a pizza, while freaking at Irma’s head which causes it to spin around and shout out the turtles.]
Irma-bot: Turtles, Turtles, Turtles.
[Everyone screams as they see that Irma was not human, but a droid all along. The Irma-bot changes into its true form where a small kraang wearing a telescopic eye patch laughs.]
Irma-bot: Turtles. Turtles.
Mikey: April, you gotta, like, pick your friends more carefully!
[The small krang laughs again while having his Irma-bot crack its knuckles.]
April: [horrified] Oh, my gosh! Irma was a..
[Kraang Subprime extends the fingers on his Irma-bot and grabs the Space Hero Arcade game.]
Kraang Knight Subprime: Kraang!
[...and throws it at the turtles while revealing his true identity.]
Subprime: Lowly insects! Kneel before the genius of Kraang Subprime! Greatest Kraang spy in all of Dimension X! The discovery of the lair was the final component needed to launch full-scale invasion!
[Kraang portals start opening around the lair in all directions.]
Donnie: [horrified] Oh, no!
Mikey: This can't be good!
[Meanwhile, Casey is trying to fight back the officers.]
Casey: Back off of me, man!
Police officer: Get in that car now, punk!
Raph: [Lamenting.] Casey, what have you done?
[He looks and sees a portal opening up in the park. He gasped in horror as an army of Kraang emerged from the portal.]
Raph: Kraang!
Police officer: Give me that stick!
[Casey kicked the man back. The image flickered, revealing to be another Kraang.]
Casey: Whoa! They're already infiltrating! They're here!
[Raph jumps down and helps, knocking the droids down and stabs them.]
Casey: Raph, what the heck is going on?
Raph: The invasion's started! Back to the lair!
[They retreat.]
Kraang: The signal was correct. Kraang has discovered the place of turtle hiding.
[They start to fire their weapons as Subprime throws the pinball game at the turtles.]
April: This is so messed up! My best friend for the past year was a Kraang?
Subprime: Fooled you! Fooled you all!
[Mikey hides under the table and throws pots at them. and knocking them down with the fridge. Ice Cream Kitty meows and high fives Mikey. Subprime grabbed Mikey and was about to slice Mikey with his chainsaw. He grabbed a knife and stabbed the robot's neck.]
Mikey: Bagel slicer slicing time robot!
[He dodges as Irma's head falls. It moves again and screeches. Completely freaked out, Mikey runs away from the spider robot screaming as it starts to fire lasers.]
Subprime: Destroy the Turtles! Wipe out the lair! But the rat comes with us.
[During the fight, Mikey kicks the robot away. Donnie takes out his leg higher and delivers a powerful kick that sends Kraang away. While holding his leg, the Irma bot bit his leg, much to Don’s pain.]
Donnie: Ow, ow, ow, ow!
Mikey: Sorry, D! Aah!
[He rolls right into his bedroom where he finds his nunchucks. Splinter is in the dojo as Subprime followed.]
Subprime: Take that, you filthy rat!
[Splinter dodged as he activated the saws. Outside, Casey and Raph are still running.]
Raph: Look out!
Casey: Whoa! Crosstown traffic!
[They hop onto the car and ride on.]
Raph: What the heck?
Casey: Oh, snap.
Raph: Move it! Run!
[They run away from the walker.]
Casey: There's too many of them, Raph!
Raph: Just keep going!
[Mikey comes out of his bedroom with his nunchucks as Leo arrives. Before the Irma bot is about to attack him, a katana sliced its head. Splinter tosses Leo's katana and Donnie's bo to his sons.]
Splinter: Go! Escape! I will hold them off.
[Subprime breaks out of the Dojo.]
Leo: We're not leaving you!
Splinter: I have a plan! Go now!
Donnie: Come on! Head for the Shellraiser!
[The rest flee to the garage.]
Subprime: You'll go nowhere!
[Subprime fired and caused the Shellraiser to explode and collapse on his side. Donnie has bug eyes, horrified and devastated by what happened to his creation.]
Donnie: [shrieking in horror.] MY BABY!!!
Leo: Everyone, follow me!
[They ran deep into the sewers.]
Leo: This way.
April: This is all my fault! I led them straight to the lair.
Mikey: Don't blame yourself, April. You were just trying to help a friend. Uh oh.
[They are surrounded by a fork in the sewer.]
April: Which way?
Donnie: Left! That'll lead us to the Turtle Mech.
Leo: [Objects.] No! We gotta find Raph and Casey first.
Donnie: We can find them in the Mech!
Leo: [Angrily.] It's too slow!
Donnie: [His patience wearing thin.] You're the one who's too slow. You're leading us into disaster.
Leo: [Defensively.] I'm doing what Splinter would want us to do.
[A portal opens up, separating Leo and Donnie.]
Kraang: It is the one called the Turtles.
[The kraang emerge and start to attack.]
Mikey: Booyakasha!
Leo: Run! Take April and Donnie to safety. I'll lead them away.
Mikey: Dude, we can't leave you too!
Leo: Just do it! Come on, Kraang! This way. Woo! Yeah! Follow me! Come on! Over here!
[The Kraangdroids chase Leo.]
Mikey: I don't like this.
[April and the two leave Leo behind.]
Mikey: Coast is clear. Okay, now the coast is clear.
[April, Mikey and Donnie come out of the sewer. Donnie is clutching his right arm.]
Donnie: Ow, ow, it hurts so bad.
April: You'll be alright, Donnie. I'll get you fixed up.
Mikey: Leo, you there? Come on, bro. Poke your head out of your shell and pick up! He's not answering.
Donnie: [Guilt-ridden.] It's my fault. Man, I shouldn't have argued with Leo. Now he's gone.
[The kraang arrive at the portal. They begin to hide behind a taxi.]
April: I don't think they saw us.
Donnie: Leo was right. We should've gotten out of the city while we had a chance.
April: Not without my dad and the others. Come on, guys.
[They begin to follow April. Meanwhile, Casey and Raph climb to the rooftop where they witness the scout ship emerge from the portal.]
Casey: Dude, this is worse than that giant Technodrome thing last year! It's totally crazy!
[Raph answers his phone.]
Raph: Mikey, where are you?
Mikey: On the way to April's apartment. Meet us there, dude!
Raph: Roger that.
Casey: Raph, look out! Aah!
[As the two fall screaming, the Kraang scout ship flies to the sky. Meanwhile in the sewers, Norman Kraangs are searching for the fugitive turtles while looking at the kraangs broken android bodies.]
Norman Kraang: Kraang, still no sign of Turtles.
[Unbeknownst to them, Leo is on the top of the ceiling, overheard their conversation.]
Norman Kraang #2: Hurry, Kraang. We must obtain the Turtles for the one called "Shredder."
[Norman Kraangs leaves as Leo jumps and realizes it was all the Shredder!]
Leo: Shredder?
[Leo runs to the surface. Meanwhile at April's apartment, Kirby is pacing and fretting over the events that are happening right outside, while April bandages Donnie's arm.]
Kirby: [panicked] The city's overrun. What are we... What is anyone going to do?
Donnie: Ow. No, I'm okay. April, now that it's the end of the world and all, again, I figured I'd better just tell you, kind of, how I feel- OW!
April: Oh, sorry, Donnie! You should stop talking. It just makes things hurt more.
[Kirby kneels and starts crying in despair over their impending death.]
Kirby: [Crying, traumatized.] We're doomed! Doomed! Oh, my poor sweet April.
Mikey: Don't worry, Mr. O'Neil. This whole alien invasion thing is really no big deal. Look.
[Mikey foolishly opens the window for Kirby to witness the chaos. Mikey quickly closes the windows, but the damage was done.]
Mikey: Oh. never mind.
[Kirby faints in shock. Mikey looks at the window again to see the city is in chaos, to his horror.]
Mikey: Oh, boy.
[In New York City, everything is in chaos. A delivery boy quickly rescues a crying girl until he saw Shredder, looming over. He runs away. He stood on the debris as Tiger Claw walks toward his master.]
Tiger Claw: The city is ours, Master Shredder.
Shredder: Since I was a boy, I have seen this very vision. The world in chaos.
[Rahzar is standing on the roof of the water tower, howling on the grey sun, and then he jumps off to report to his master.]
Rahzar: Master Shredder, the Kraang have sent word. Leonardo is not far from here. They're leading him straight to us.
Shredder: Excellent. Then it is the beginning of the end.
[The lair is on fire as Splinter faced Subprime.]
Subprime: Now I've got you cornered, you monstrous rat!
Splinter: Corner a rat and see what happens!
[Subprime roars. He begin to dodge as Splinter kicks Subprime. Using his knife, he stabbed the chainsaw and kicked Subprime back. He falls right off his droid.]
Subprime: Kraang shall dominate the Earth! You and your kin will be destroyed! Kraang will be back! Ow!
[Kraang Subprime is crushed by the debris as he coughs, then his tentacle goes limp as he groans and presumably "dies". With his enemy’s presumed "death", Splinter watches at the destruction of his house as he collapse to his knees and picks up the broken picture of his beloved sons. Looking at it with distraught and heartbroken expression on his face, Splinter closes his eyes, not wanting to lose his sons, just as it happened to her daughter. Splinter decides on a desperate hunt for saving his beloved children and to stop the invasion of kraang for good.]
Splinter: [Closes his eyes, distraught] Don't stand here like a fool, Yoshi. [Opens his eyes.] Find your family.
[Splinter goes on the search for the turtles. Meanwhile, Leo emerges from the outside and starts fighting the foot clan along the way. He entered the construction site to rest. He looked at his phone but no text and so many missing calls. Couple of footbots began to sprint toward the where Leo is hiding, but did not find the turtle. Leo sneaks past and destroys the foot bots along the way. The villains look at Leo fighting with them expressing respect towards the young turtle for his selfless bravery.]
Tiger Claw: He fights bravely.
Shredder: [Arrogantly.] He is young, overconfident, foolish.
[Leo continues on fighting.]
Rahzar: Do not take chances with him, Master. We should destroy him quickly!
Shredder: Archers.
[Archers prepare to fire at Leo by pulling the strings of their bows. Leo decapitating the last footbot.]
Shredder: Fire!
[The archers launched their arrows. Leo turns around as incoming volly of arrows are about to rain down on Leo.]
Leo: [Horrified.] Oh, no.
[Back with Raph and Casey.]
Casey: Just a little further to April's place!
[Suddenly, another portal opens, revealing Kraang Prime!]
Kraang Prime: Yes! Kraang Prime returns to Earth!
Casey: You got some kind of plan to fight that?
Raph: Uh, not really, no.
[They step away.]
Kraang Prime: People of Earth, the Kraang forming of your world is about to begin!
[He starts shooting mutagen at the innocent people. Raph and Casey are completely horrified and distraught by what they saw.]
Raph: [distraught] No!
[Coming out of the perfected mutagen, humans became nasty looking kraanganoids. Realizing that the beginning of the end is inevitable, Raph and Casey watch helplessly in horror.]
Casey:[horrified] Now that is really messed up.
[Meanwhile, in April's apartment, Carlos is telling the news.]
Carlos: Invasion! That's right, folks. The aliens are back! Robots are emerging from portals! UFOs are everywhere! A giant alien brain is stomping through the east village!
[Kirby huddles on the couch while April and the two turtles watch the news after the screen went static.]
Donnie: Yeah, I'd say we're basically doomed.
April: [feeling terrible] This is all my fault. If I hadn't brought Irma to the lair...
Donnie: You can't blame yourself, April.
Mikey: Yeah, we can do that for you.
[Donnie hits Mikey. Sighing, April knew she had to fix everything.]
April: I'm gonna fix this. I'm gonna find your brothers and Casey.
Kirby: [petrified] You can't go out there, April! You have to stay with me. I'm scared.
[Mikey looks at his phone,]
Mikey: Whoa! Raph just sent me a text. "On our way, being chased by Kraang Prime. [offscreen.] Frowny face. " Oh, guess they'll be a few minutes late.
[Raph and Casey are running from Prime.]
Kraang Prime: You cannot run, earthlings!
[Kraang Prime fires his mutagen gun, but Raph and Casey dodges it. The mutagen projectile ended up turning the human and a dumpster bin into a kraang zombie and a giant tree crystal.]
Kraang Prime: Your entire planet will transform! [Laughing evilly.]
Casey: Raph, what is going on?
Raph: The Kraang perfected the mutagen! They want to turn Earth into Dimension X!
Casey: [impressed] Wicked!
Raph: [angrily] Wicked? Are you crazy?
[Pigeons transformed into Rocktopus' cute mop mop heads. Humans started running in fear screaming as Raph and Casey dodged hurling cars thrown by Kraang Prime. As Raph and Casey recovers, they were being gun pointed by Kraang Prime.]
Kraang Prime: Goodbye, lower lifeforms.
[Something hit Kraang Prime on the face]
Kraang Prime:[Whips around.] Aah! What?!
Agent: Earth Protection Force, move! Get into formation. Flanking maneuver. Go, go, go!
[Some tanks and agents have arrive]
Agent: Team two, cover quad four! Hut, hut, hut!
Kraang Prime: Pathetic humans.
Police: Fire!
[The agents started to fire at him, giving the chance for Raph and Casey to escape.]
Raph: Now's our chance! Run!
Casey: But it was just getting awesome.
[Meanwhile, Leo continued to dodge and deflect the arrows as he back rolled.]
Leo: Stop hiding behind your Footbots! Face me, Shredder!
Shredder: You are beneath me, turtle.
[A chain dragged him pinning him into the wooden fence as a footbot charged at him. Leo throws his sword at it, killing it. Leo avoids the blades attempting to stab Leo from the wooden fence as The footbots burst out of the fence. Recovering from the charge, Leo tries to fight back from the footbots but ends up getting kick to the lower levels of the hole. Leo from below watches as the rest of the footbots surround the turtle.]
Tiger Claw: You should let me finish him, Master.
Shredder: Not yet. I want to see him suffer.
[The footbots began to charge at Leo as the turtle charges at them with his other katana.]
[Splinter looks for his sons in the sewer as he comes across one of Leo's shards stuck on a Kraang.]
Splinter: [Softly] Leonardo.
Kraang: It is the rodent known as Splinter. Exterminate. Exterminate.
[Splinter dodges until something bites the robot's head off.]
Leatherhead: Kraang!
[Leatherhead started to beat the kraang to death in his rage.]
Splinter: [Angrily.] That is enough! ENOUGH!
[Leatherhead stops and calms down.]
Splinter: Leatherhead, my thanks.
Leatherhead: [Respectfully.] Great Splinter, where are your sons?
Splinter: Lost in this madness. Will you help me find them?
Leatherhead: Anything for my friends.
Splinter: Then let us hurry.
[Leatherhead and Splinter run off to find the Turtles. Meanwhile, Leo is continuing fighting the robots. But then, one made him trip to the bottom of the site. He comes out of the water, panting hard. He stood up and faced his enemies, gasping and breathing, looking completely chilled.]
Shredder: Now you may finish him.
[The three mutants attack him and beat him up, but Leo, his eyes turned white and is now very furious. Leo then shows his rage amplifying his strength to defeat, and even mutilate his enemies. Leo grabs Fishface by his breathing apparatus, then beats him up and threw him to the ground. Leo tackles Rahzar, grunting in rage. When Rahzar tries to shake him off, Leo flies into the air, then delivers a powerful kick that brutally sent Rahzar to the ground. Leo lets out a shriek of unbelievably unfathomable rage. Tiger Claw attempts to punch Leo, but Leo viciously kicks Tiger Claw to the wooden planks. Leo is triumphant, but then Shredder appears when the storm strikes and when Leo turns around at the last second, Shredder slashes Leo and Leo lets out one last shriek of shock, before falling to the ground, completely knocked out cold. Leo's entire body was covered in bruises and blood. Shredder and his henchmen look at Leo’s completely senseless body. Tiger Claw grabs Leo and sees his T-Phone.]
Tiger Claw: They wait for him in the girl's home.
Shredder: Bait them out and destroy them.
[As the mutants leave with Leo’s body, Splinter, who's grieving over how his son disappeared, has been confronted by the Shredder. Lightning strikes as Splinter's enraged eyes are seen.]
Splinter: [furious] Where is my son?
Shredder: [remorseless] I take him like I took your child so many years ago.
[Shredder laughs. Believing his son is killed, fury burns in Splinter's eyes and hands: Splinter flies into a rage and furiously charges at Shredder, Back in April's apartment, where Kirby is still unconscious, but the water wakes him up.]
Kirby: I just had the worst dream. The Kraang were trying to invade.
Mikey: Don't worry, Mr. O'Neil. Reality is way worse than your nightmare.
[Kirby whimpers in fear and Donnie hits Mikey for scaring Kirby even further. Then Raph and Casey entered the apartment.]
Raph: We gotta move. Kraang Prime is stomping this way.
Mikey: Raph! [hugs his brother, relieved]
Raph: [pats him] Aw, I missed you too, little brother.
April: [hugs him, overjoyed] Casey! Oh, I was scared I'd lost you forever.
Casey: [kindly] No worries, Red. Your man is here.
Donnie: Uh, not to break this up, but Leo is still out there!
Raph: [shocked] What?!
Mikey: Long story, bro. Basically-
[All of a sudden and without any simple warning, the unconscious Leo crashes into the room through the window, landing harshly colliding with the ground as the others watch in complete horror. Glass shatters, sprinkling the air like confetti and scattered all over the floor.]
Raph: Leo!
[Everyone gathered around Leo's limp form. Raph and Mikey cradle Leo’s body.]
April: Leo!
Raph: He's still breathing.
Mikey: Dude, his shell is cracked!
[Everyone watched in shock as Tiger Claw’s voice ordering the Turtles to come out.]
Tiger Claw: Come out, Turtles! We know you're in there!
[Foot bots invade the apartment, Casey takes them down with his bat as more invade. Raph began to carry Leo over his back.]
April: This way!
[They were about to leave, but the ninja blocks them, Donnie destroys him with his bo staff. Everyone began to exit, but Rahzar surrounds and roars at them, but Mikey, who is vengeful at Foot for injuring his oldest brother, furiously throws the couch right on top of Rahzar.]
Mikey: [furious] This is for my brother!
[The couch crushes Rahzar. Tiger Claw started to fire but Donnie used a smoke bomb at him, causing Tiger Claw to roar. They began to run to a van.]
Kirby: Hurry, this way!
Raph: What the heck is that?
Kirby: It's my old party wagon from back in my hipster days. Groovy.
[Suddenly, mutagen landed on Kirby, causing him to scream. Kraang Prime laughs maliciously as Kirby turns into a krang zombie.]
Donnie: Kirby!
April: [Horrified and dismayed.] Not again!
Casey: April, move!
[They get into the van.]
Raph: Floor it, Jones!
[Casey starts the wagon and drives off. Prime started to fire mutagen as they try to escape.]
Kraang Prime: I'll get you all!
Shredder: You grow tired. Your skills have become weak. Yet I am stronger than ever. Fueled by anger, by rage!
Splinter: Rage is a fuel that burns quickly.
Shredder: Always the wise one. What wisdom do you have now?
[Leatherhead attacks Shredder.]
Leatherhead: My friend, are you hurt?
Splinter: Look out!
[Shredder jumps onto Leatherhead's back. The gator struggles to get off of him, but gets easily defeated. Shredder furiously delivers a kick that sends Leatherhead to the water. When the boards break, Leatherhead falls, presumed dead. Splinter, full of righteous fury, shrieks, then gets the planks off of him and jumps at Shredder as they fall into the sewers. Meanwhile, the turtles and April leave Casey’s van.]
Casey: This looks like a safe spot.
[Raph exits the wagon.]
Raph: Come on. We gotta find Splinter!
Mikey: No way! What about Leo?
Donnie: We shouldn't move him.
Casey: He can stay with me. I'm going back to search for my family.
April: Okay, but we meet back at this spot.
Casey: You got it, Red.
[Casey drives off. Raph and the team enter the broken lair.]
Raph: Sensei, you in here?
[No response...]
April: He's not here. I don't sense him.
[Donnie looks at the photo.]
Donnie: We gotta move. Everyone, gather one meaningful thing you want to take with you. First we find Splinter, and then we get out of town.
[The turtles started packing their things. Raph grabs his picture of Spike in his room.]
Raph: Wherever you are, I hope you're safe, Spike.
[Donnie grabs his toolbox with his aid kid, beakers and vials and looks at the frozen mutagen man one last time.]
Donnie: [Gently.] We'll be back, Timothy. And if we don't make it, you should defrost in about seventy years or so. Hopefully the world is a better place by then.
[Cut to the kitchen.]
Mikey: I know this is your home. You know we have to leave, ice cream kitty. Now come on, kitty, kitty. Easy, easy. [he gets Kitty out of the freezer and into his box] Just squeeze in there between the frozen pizzas.
[April looks around the lair, until she sees the TV turn on and flickering. She suddenly sees a vision of Splinter fighting Shredder.]
April: Ah, my head!
Donnie: April, what is it?
April: Master Splinter. I can sense him. Aah! He's close.
Raph: Let's go!
[They leave the lair and go into the sewer.]
April: This way.
[They headed over and saw Shredder fighting Splinter.]
Shredder: Now I will tear you to pieces!
Mikey: Sensei!
Splinter: Go! Leave this place!
Shredder: Fitting that your sons are here to see you fall.
[Shredder continues to attack Splinter as the later continue to block. Shredder knee attack Splinter.]
April: You can do it, Master Splinter!
Raph: Splinter, take him down! Take him down!
[Shredder throws powder at Splinter, blinding him. Just at Shredder was about to land the final strike, Splinter uses a powerful mojo causing Shredder to be surprised and knocked back to the wall.]
Splinter: Now, quickly, we must find a way to get out of here.
[Shredder emerges from the hole from the wall and knocks Splinter from behind. Shredder throws a kunai at Splinter, knocking old sensei out unconscious.]
Mikey: Sensei!
April: No, no, no!
[Shredder picks up Splinter from the back of the collar and uses his leg to open the wheel to unleash the sewer flood waters.]
Donnie: Don't do it!
Raph: Splinter!
[However it was too late. Shredder throws Splinter to the water, where he was sucked by the water vortex, presumably killed.]
All: [horrified] NO!
April: Master Splinter!
[With Splinter seemingly dead, an enraged Raph furiously pushes April and walks towards the bars]
Raph: [incredibly furious] YOU!
[Shredder turns around, looking at the turtles and April with sneer, knowing that it will hurt the turtles and April.]
Raph: You monster!!
[Raph yells furiously, while shaking the bars. Donnie, Mikey and April are completely shocked by Raph’s rage. Shredder leaves, clutching his wound on his shoulder and ignoring Raph. Full of rage, Raph tries to go after Shredder, but the bars won't let him through.]
Mikey: That's enough, Raph. Enough!
[Raph turns around yelling, blinded by rage. He throws a fist a whatever or whomever is in front of him but surprisingly Mikey doesn't fight back, only emotionally hugs him.]
Mikey: It's okay, bro. Sensei's a Master ninja. He's gonna be just fine. It's gonna be alright.
[Raph, realizing what fury turned him into, hugs Mikey back. April sniffs, lowering her head.]
Donnie: April.
April: We're not running, Donnie. We're gonna put an end to this.
[Donnie nods with a determined expression on his face. Cut to Turtle Mech.]
Mikey: Oh, yeah! Turtle Mech power!
[The kraang started to fire]
Donnie: April, pull that lever to your left. Hit the pedal!
[April started to move the button and stomp the krang,]
Mikey: Dude, this is the coolest thing ever! All my Super Robo Mecha fantasies come true!
[The mech started to burn the kraang. The alien retreat from their robotic suits.]
Kraang: Run, Kraang! Kraang, run!
[The bodies began to fall as the mech grabbed a dumpster and crushed the kraang. It walks forward and finds Shredder's lair.]
Mikey: There it is Shredder's lair! Let's get him!
[A laser stops them.]
April: Um, guys I think we're in trouble.
Raph: We won't stand a chance in this thing!
Mikey: We can do this! Super Robo Mecha Force fought way bigger enemies.
Donnie: Booyakasha!
[They start to fire an acid can at Prime. He screams in pain.]
Kraang Prime: Lowly insects! Do you think Kraang can be stopped? It was Kraang who found your planet millions of years ago. It was Kraang who used mutagen on the monkeys, turning them into lowly humans. And it is Kraang who now transforms your world!
Mikey: And it will be Kraang who gets kicked in the shin.
[ The mech kicks him, but it won't budge. The alien started to use its laser at them.]
Donnie: Grappling hooks!
[They dodge the laser to the rooftop and run away. They fall down and crash.]
April: Is everyone okay?
Raph: Sort of.
Mikey: Not really.
Donnie: Barely functioning.
[The mech starts to get back up.]
Raph: Donnie! Donnie! Get this thing moving, Donnie!
[Kraang Prime grabs the mech.]
Kraang Prime: Kraang has had enough games.
[Donnie used flamethrowers and burned the robot's face. He lets go of the mech, causing it to crash.]
Mikey: Dude, weapons are down!
Donnie: We got one last trick left, but it might fry the Mech.
April: I don't think we have a choice.
Donnie: Readying electro harpoon.
[The cable shots into the power grid.]
Donnie: First, we tap into the city's power grid. Then we-
Mikey: Fire!
Kraang Prime: Goodbye, Turtles!
[They start to electrocute Prime with all of the energy they got, causing a blackout throughout the city. The titan suit exploded and collapsed.]
Donnie: Gah! Gotta shut down the system.
[The mech shuts down as April coughs. They realize they won.]
April: Yes!
Mikey: That's what I'm talking about!
Raph: We did it! Kraang Prime is toast!
[Kraang Prime pops out of his giant suit and roars in anger.]
Mikey: [scared] Um, not really.
[The angry alien starts to charge at the mech.]
Raph: Donnie, make this thing move!
Donnie: I can't. It's fried! Abandon ship! Abandon ship!
[They get off and and run as the alien jumped onto the mech.]
Kraang Prime: You will all suffer!
[April screams, knocking the alien back until Casey arrives]
Casey: This is so metal!
[He hits the alien with the van, closing in on the turtles and April.]
Casey: You guys need a lift?
[Everyone enters the van and leaves the kraangitized city, Kraang Prime roars at them in anger. After they escaped the city, Donnie covers Leo's unconscious body with blanket, and apologizes very deeply.]
Donnie:[remorseful] I'm sorry, Leo. You were right. If we'd just left the city when you said, the Kraang would never have found the lair and started the invasion, none of this would have happened...
April: I have a place we can go upstate. My old family home. We used to go there every summer. We can stay as long as we want. No one's around for miles.
Casey: Upstate, eh? Sounds good to Casey Jones.
April: Did you find your dad and little sister?
Casey: No sign of 'em. They probably got kraangitized.
[Realizes Casey's family's gone too, April hugs heartbroken Casey, who looks surprised. Mikey and Raph hold each other.]
Mikey: What's gonna happen now, Raph?
Raph: For the first time in my life, [Closes his eyes.] I have no idea, little brother.
[The scene cuts to the Wagon driving to the city limits, where they left the city, possibly forever.]
Mikey: [offscreen] I miss Master Splinter.
[Meanwhile, Splinter is washed down a sewer tunnel into a junction where Karai grabs him and lifts him out of the water. As she touches him, Splinter gives a gasping breath, and Karai jumps back into the water and disappears, continuing the next season.]