[It started out as a rainy night, in the Turtles' lair, Donnie is preparing to examine April in regards to her recent increase in her psychic powers as Leo watches.]
Leo: Are you sure this is a good idea, Donnie?
April: Um, yeah. Last time you hooked me up to this thing, it made me blind and mentally connected to a giant fish-bird-worm thing.
Donnie: Don't worry. I've upgraded it since then. It's perfectly safe I promise. Your psychic powers have been expanding rapidly since you were given that Aeon crystal. It's imperative I test its limits. For your own sake.
April: I have it under control. Besides, if it weren't for my powers, we never would have gotten away from Shredder. You saw what I did to that mutated freak.
Leo: That's what worries us.
Donnie: I just need to examine your crystal.
April: No! I'm not taking it off. Don't even ask again, Donnie. It's safe, as long as I have it.
Donnie: Hmm. If I can replicate how this crystal increases your powers, that could provide a frame of reference.
Leo: Increase her powers?
Donnie: Don't worry. Only slightly. By maybe 3%? April, let me know if you feel anything. Okay? Tingling, headache.
April: [annoyed] I told you, I'm fine. Just leave the crystal- Ahh!
[She yells crazily as her powers start lifting things up to the air!]
Leo: [aghasted] I knew this was a bad idea.
[The lab explodes]
[theme song]
[Raph and Mikey enter the lab and are shocked.]
Raph: What are you guys- Huh? Oh, no. April!
Mikey: Whoa! Are you guys having another super-smash dance party without me?
Leo: She's out, but she seems okay.
[Donnie takes the crystal off]
Donnie: We've got to get this away from her. Huh? Oh! The crystal!
[The crystal started to move but Raph catches it.]
Raph: I got it.
[Then he pinned it with a nail.]
Donnie: That should hold it, for now.
Splinter: What happened in here? April?
Leo: It's that alien crystal. It's been messing with her head.
Splinter:[worried] That crystal has a strong hold on both her mind and spirit. It has become too dangerous.
Donnie: Sensei's right. I need to break its connection with her. Somehow.
Splinter: I will tend to her in the dojo. Perhaps the mantras will help.
Leo: I got her, Sensei.
[Leo carries April as he and Splinter go to the dojo. Meanwhile, Casey is seen on the rooftops. He is bored as he throws the soda cans he crushed at the rats.]
Casey: I can't believe Raph left me on Foot patrol alone. Eh, nothing really happening. Wait, what's this?
[He looks and sees Tiger Claw.]
Tiger Claw: Careful with that shipment. There isn't much left and Shredder needs every last drop to maintain his mutation.
Casey: Man, Super Shredder must have got really messed up... I gotta call Raph!
[Later, Raph answered his T Phone.]
Raph: Mutagen? Okay, sit tight. We're on our way. And don't do anything stupid like try to take them on all by yourself again.
Casey: Casey Jones makes no such promises.
Raph: We gotta move. Casey spotted Shredder's goons wrestling up some mutagen from an old Kraang lab.
Leo: Let's go. Donnie?
Donnie: I need to keep an eye on this crystal. It's too dangerous to leave unattended. And I have to find a way to sever its connection to April.
[Later, Casey waits for the others.]
Rahzar: Let's get a move on.
Casey: What's taking the guys so long?
[The van starts to take off.]
Casey: Once again, it's up to Casey Jones to save the day.
[He heads over there and jumps onto the van. Fishface sees Casey through the mirrors.]
Fishface: Eh? What? That vigilante idiot!
[Fishface tries to get rid of Casey by turning the van, but to no avail. Suddenly, Tiger Claw's sword, Footbots sword and Rahzar's claws come out. Casey opens the door, revealing Footbots and Rahzar.]
Casey: Ah, nuts.
[Footbots trying to stab Casey, but it fails. During the skirmish, Casey enters the van and fights Rahzar.]
Casey: If Shredder wants that mutagen, you're gonna have to go through me first!
[Casey throws Rahzar out of the van.]
Tiger Claw: I want to finish this one. Personally.
[Casey knocks him out by opening the back van. Tiger Claw roars while shooting lasers at Casey.]
Casey: Glad I saved this baby.
[Casey smacks the photon puck at Tiger Claw in slow motion. Shocked, Tiger Claw uses his sword to slice it, but two pieces fly into Footbots, who explode. Casey electrocutes Fishface with his taser, throws him off of the van and goes to the driving seat.]
Casey: Say "what's up" to Shredder for me!
Tiger Claw: No! After him!
[Engulfed in flames, Footbots and Tiger Claw ran after him. Back in the lair.]
Donnie: This is strange. But I think I'm beginning to get it now.
[In the dojo, Splinter meditates, but then sees great Aeon right in front of him as he eats him.]
April: [wakes up] My... my crystal! Where's my crystal?
Splinter: April, calm down. Donatello is examining it while you rest.
April: No! No, it's mine! I need it!!
Splinter: April. You are addicted to that alien stone. You do not need its power. You must break its hold on you now!
[April levitated Splinter and then broke his bones, her eyes glowing white and her hair flowing. The crystal started to move. Donnie tries to hold onto but he gets dragged into the dojo.]
Donnie: April. What are you doing?
[April starts to choke him. Donnie’s face starts to turn pale as grabs his neck and chokes.]
Splinter: April, you must hear me. This being wants to control you. Fight it!
April: Master Splinter, I...I can't fight her. She's too strong.
[They were let go as The two watched April float in the air.]
Donnie: April, stop! You have to control it. No!!
[April broke free and rose high into the air and then a female voice came from April's mind.]
Za-Naron: I'm free! I can feel the power of this city. So many lives. Look at them. Like insects.
April: Wha? How did I get up here? I was in the lair, but I-
Za-Naron: Now you are where you were meant to be, among the stars.
April: These people so many. I can hear them mentally crying out, begging for help.
Za-Naron: There are so many more who need to be punished. They are causing endless pain and suffering. Get rid of the pain, and this world will flourish.
April: Yes. I understand. I have to save them. I-I can save all of them. Casey!
[Casey is driving the van and he came across the elite bots, he managed to serve them away.]
Casey: Eat it, Footbots! Ahh!
[He crashes into a dumpster, loses control and gets out of the van. He tries to run but he becomes surrounded.]
Tiger Claw: I tire of you, boy.
[Enraged at Casey for what he put them through, Tiger Claw and Fishface beat him up and knocked him down. April arrives, possessed by the unknown spirit.]
Fishface: This menina will be no problem.
[April / Za-Naron used her powers to break fFshface’s legs. Rahzar was then crushed by a dumpster when he attempted to attack.]
Tiger Claw: Your parlor tricks won't stop me, girl.
[The power grabbed his throat and then was sent crashing to the wall. Casey dodges and sees Tiger Claw slams into the wall, knocking him out cold. Casey looks at April.]
Casey: [shocked] April?
[The turtles arrive]
Raph: What happened here?
[The demon releases her mind]
April: Where am I? Why am I here?
Mikey: That's what I was gonna ask you.
[Za Naron possessed her again and leaves]
Leo: April! Where are you going?
[The turtles and Casey ran after April, leaving the mutants knocked out and defeated. In the lair, Donnie recovered and found Splinter in the debris.]
Donnie: Sensei!
Splinter: I will be fine. April?
Donnie: I should never have tried testing that crystal.
Splinter: She possesses a power I have never seen before, but it is not your doing. I fear she can no longer control it.
Donnie: I have to get that necklace away from her and destroy it. Somehow.
Splinter: Please, be careful, my son. That being was not April.
Donnie: I can get through to her, Sensei. I know I can.
[Meanwhile, Casey and turtles head to the building of Channel 6. The turtles get to the building, while Casey is the last one to make it.]
Casey: [annoyed] Aw, nuts! Still beat me.
[April regains her senses as she floats down.]
Leo: What's happening to you?
Mikey: I thought Donnie and Splinter were looking after you.
April: I guess. I don't remember! Ahh!
Mikey: It's that crystal! It has some seriously bad juju, dudes!
Leo: It's changing you, April.
[The spirit again opened her white eyes.]
Za-Naron: There is no April. Only Za-Naron.
[Donnie looks and finds that April is on the Channel 6 building.]
Leo: What do you mean, you're not April? Who is Za-Naron?
[flashback]
Za-Naron: I am the Soul of an Elder Aeon, one of the First Seven. After a hundred millennia our physical forms had disintegrated, so our spirits were each placed into the Soul Star, to exist forever. I have been transplanting my mind into her consciousness [end of flashback] slowly. But the Aeons did not know how corrupt this planet could be. I intend to save it.
[They get blown off the building, but they escape to the bottom safely. As they recover, Leo, Mikey, Raph and Casey see Donnie is climbing the building.]
Mikey: Donnie!
[He reaches the top.]
Donnie: April!
Za-Naron: Foolish mortal. Stay out of my way.
Donnie: April, it's me, Donatello!
April: Donnie? Ahh!
Donnie: Listen to me. Give me the crystal. Just give me the crystal and everything will be okay.
Za Naron: No!
[She lifts Donnie up high in the air]
Donnie: Ah!
Leo: Donnie!
Mikey, Raph and Casey: Donnie!
[The turtles climb to the top with their grappling hooks.]
Donnie: This isn't you, April! That crystal is changing you! You need to break free!
April: Ah. It's too much power. I-I can't control it anymore. [groans.]
Donnie: You can do it! I know you can!
April: I'm not strong enough. Donnie, I'm sorry.
Donnie: April? Please.
[April tries, but Za-Naron is stronger. Finally having enough with Donnie for interfering her plans, Za-Naron clenches her fist as Donnie's body begins to reduce. ]
Donnie: APRIL! PLEASE!!!
[But it was too late. Za Naron reduces Donnie and he explodes into atoms, killing him, much to the shock and horror of his brothers and Casey.]
Leo and Raph: DONNIE!!!
Casey: Oh, my gosh!
Mikey: NOOOOOOOOOO!!!!!!!!!!
[Donnie disappears and all what is left of him is his bandana mask. Casey looks completely horrified as rain started to fall. Za-Naron yells triumphantly as powers electrify the tower which turtles and Casey were climbing, and they all fall. Everyone stands up as Raph growls angrily. By the time they recover, they notice she's vanished.]
Raph: She's gone. What do we do, Leo? What just happened? Is Donnie gone?
[Leo grabs his dead brother's purple mask and growls, then drops to his knees and sighs heartbrokenly, with the rest of his brothers and Casey looking devastated.]
Casey: [devastated] Poor Donnie.
[April comes back and falls into exhaustion.]
April: [horrified and tearful] No! Donnie. I can't believe it. How could I?
Za-Naron: You made your choice, and you chose the crystal. Let go of your connection to these sub-life forms who pollute this planet. I must cleanse it, starting with this city.
[The purple dragons corner an old woman.]
Hun: This is Dragon Territory, grandma. If you wish our protection. ...
[April arrives]
Hun: Come to play, girl?
pNaron used her powers and knocked them down.
Hun: Impressive tricks. Ever think of joining the Purple Dragons?
Za Naron: No..
[She pushed him back.]
Leo: You can't do this, April! Or Za-Naron, or whoever you are!
Za-Naron: Do not stand in my way, or you will be cleansed just as Donatello was.
Leo: We have to stop her.
Casey: Well, what if April is still in there?
Raph: Are you kidding? I don't like it, but April O'Neil is gone. We have no choice. We take her down!
[Casey is devastated. Raph strains her.]
Raph: Do it! Hurry!
Mikey: I can't hurt her, dude.
[She lets go of Raph's grip and is about to cleanse Raph as well as she did to Donnie, but Leo and Mikey use kusarigama to strain her as Raph falls on the car, groans in pain and is injured. Casey comes to Raph's aid.]
Casey: We know you're in there, Red.
Mikey: We're your friends! Your family!
Leo: Remember who you are! You are April O'Neil. Remember everything we've been through together.
Casey: Yeah, like the time we fought a giant mutagen man? And our dope missions in space.
Mikey: And Master Splinter. And pizza parties. And Ice Cream Kitty.
[She yells and breaks free, sending Leo and Mikey to the asphalt Angrily, Za-Naron throws Casey away so she can cleanse Raph.]
Raph: [near death] Remember Donnie.
[She closes her eyes, remembers every moment with Donnie, gets weak.]
Leo: We don't have the power to destroy the crystal. Only you do, April.
[April tears the Aeon crystal from her neck, and with a final, furious yell, throws the crystal to the pavement, shattering it. However, this results in Za-Naron being exorcized from April's body now that her link to April was destroyed, and reassuming a physical form as the Aeons' corrupted form seen on Xaava-Dal.]
Za-Naron: [enraged] Foolish creature. You could have had all the power of the universe.
[April draws her tanto blade, charges Za-Naron back, and when the two collide, April slays Za-Naron once and for all, ripping her physical form to shreds, and leaving Za-Naron's energy to disperse as Za-Naron lets off one, final anguished scream of defeat before being silenced for good.]
Casey: Red, is that really you?
April: I think so. But… but Donnie. What have I done? [crying]
Leo: It's not your fault, April.
April: But it is! It was all me in a way. If only [gasps.] Donnie's not gone! He wasn't really destroyed, just molecularly scattered.
[She slowly began concentrating as hard as she could with the broken pieces, she's able to retrieve all of Donnie's molecules and restore him to his full, corporeal, physical form..]
Raph: Yeah!
Mikey: Bro!
April: Donnie! [hugs him] Thank goodness.
[She slowly collapses.]
Splinter: April? April? April.
[April slowly awakens in the lair.]
April: I'm so sorry. I guess I should have listened to you about the crystal. Especially you, Donnie. I'm sorry.
Donnie: For what? Reducing me to a quantum smear? Yeah, I still feel kind of whacked out of my head, but I'll be fine.
Splinter: I am impressed, April. You literally destroyed your demons.
Raph: She almost destroyed all of us.
Leo: What about your powers?
April: They were always part of me. I can't harness the power of the Aeons anymore, but I think I know how to control my powers better.
[She uses her powers, as turtles and Casey watch in shock, but suddenly she uses her telepathic powers to lift her tanto, watches at it.]
April: So at least some good came out of this.
[April watches in pride and satisfaction.]
[Episode ends.]