[Episode starts with Donnie fights with Mikey at the dojo with Mikey impressively fighting. Mikey backflipped over Donnie and landed slid back more, laughing.]
Donnie: Dude, what are you doing? You don't defend against Seoi Nage with back flips.
Mikey: Why not? Back flips are where it's at.
Donnie: The best defense is to roll along my back, then take me to the ground and put me in an armlock. Unless, of course, I counter with a-
Mikey: Hey, man, you can't take the fire out of- [backflips] hi-yaah! Dr. Flip-enstein!
Donnie: I don't even know what that means. Master Splinter, what would you do if someone tried to throw you with Seoi Nage?
Splinter: I don't know.
Donnie: Come on, you must have planned a response for every attack.
Splinter: If you think too much about what is coming, you lose sight of what is. You must be fully in the moment so you can fight without thinking.
Donnie: Why would I want to fight without thinking?
Splinter: Allow me to demonstrate. Prepare to defend against Seoi Nage.
[Splinter attacks Donnie, spinning, kicking him and pinning him down.]
Donnie: Ow! That wasn't Seoi Nage!
Splinter: No, but you thought it would be. Now, would you like to prepare to defend against a spinning back-kick?
Donnie: [weakly] No, I'm good.
Mikey: [laughs] Know what would have worked there? Back flip.
[theme song]
[In the lab, Donnie is working on some kind of flowchart while the others sneak around him.]
Leo :What you up to, Donnie?
Donnie: Just putting the finishing touches on my master plan.
Raph: Master plan?
Donnie: Yeah, to get April to hang out with me.
[The turtles laugh]
Leo: Try this, "April, do you want to hang out with me?"
Donnie: Yeah, you see, it's not that simple. I have to prepare for every possible response to maximize my chances of success.
Mikey: Aw, that's so romantic!
[Donnie then pulls up a conspiracy board.]
Donnie: Yeah, for instance, if April says she can't because she has homework, then I will suggest an informal study session and serve healthy, brain-stimulating snacks.
Raph: Well, what if she says she can't because you're a total nerd?
Donnie: Ah, that's this thread here. I will list my many non-nerdy qualities and suggest activities that will highlight my coolness, such as skateboarding or shark wrestling.
[April rushes in with her laptop and a panicked look on her face.]
April: Guys!
[Donnie yelps and switches the plan to show a poster of Space Heroes.]
Donnie: Hey, hey, Ap… hey, April.
April: You guys gotta check this out.
[She pulls out her laptop.]
Carlos: Renowned neurochemist Dr. Tyler Rockwell has been reported missing. I spoke with Rockwell's colleague, Dr. Victor Falco.
[The video shows a man.]
Falco: I hadn't heard from him in days, so I stopped by his lab. The place was a mess and he was gone. I fear the worst.
Carlos: Police say they have-
[April closes the laptop.]
Leo: So?
April: So the Kraang have been kidnapping scientists from all over the city, including my Dad! Maybe that's what happened to this Rockwell guy.
Leo: Or they may not be connected at all.
April: There's only one way to find out. We should go to that lab and look around.
Donnie: April's right. We should go check it out. What's that? You guys are busy? Guess it's just the two of us, April.
[They leave.]
Leo: I bet that wasn't on his flowchart. Whoa. It is! That is spooky.
[Donnie and April arrive at the apartment as the purple turtle uses his lock pick to unlock the lab.]
Donnie: There isn't an electronic lock out there, my digital lock pick can't crack.
April: Smooth!
[Donnie giggles. They slowly enter the lab, completely dark. April shines her flashlight to see empty vials and dented cages.]
Donnie: Wow, this place is a wreck.
April: Ugh, he must have been experimenting on animals.
Donnie: Either someone was up to some secret research, or they were renting space to one freaky dentist!
[Donnie looks in one of the cupboards and sees something green. They open it, revealing a mutagen canister. April takes it out..]
Donnie: Mutagen!
[Suddenly, a man with a golf club appears and attacks!!]
April: Donnie, look out!
[Donnie hits him and pins him to the ground. April opens the light, the man is none other than.....]
April: Dr. Falco!
Falco: [screams] What are you?!
Donnie: Relax. I'm not gonna hurt you.
Falco: You already hurt me!
Donnie: [lets go] I mean any more.
April: We're here to help.
[Later, after they explain about the situation.]
Falco: I'm sorry. I wish I knew something about your father, but I don't.
Donnie: [holding the canister] So what can you tell us about this?
Falco: Some shady corporate goon paid Rockwell a lot of money to experiment with it.
April: This the guy? [holds the photo of the Norman Krang.]
Falco: That's him.
Donnie: The Kraang!
Falco: Well, I wanted no part of that stuff. Who knows what kind of monstrosities could result? No offense.
Donnie: Some taken.
April: [looks over at the cage] Is that what was in that cage over there? One of his monstrosities?
Donnie: Can we ease up on the m-word, please?
Falco: That's where he kept the monkey he was experimenting on.
Donnie: Whoa. It sure didn't like being locked up in there.
Falco: Rockwell didn't treat it very well.
April: Maybe the Kraang didn't take Rockwell. Maybe the monkey went berserk, busted out of the cage, and dragged him off or worse.
[On the street, Donnie and April walk down to return to the lair.]
April: So how do you suppose we're gonna find Rockwell without any leads?
Donnie: Well, maybe we'll know more once we have a look at his flash drive.
[Unknown to them, a figure was spying on them on the rooftops.]
April: What flash drive?
Donnie: The one I swiped off his desk.
April: Nice!
Donnie: Yeah. Well, keeping cool under pressure is the hallmark of a-
[Suddenly, the same mutant monkey appears, roaring. Donnie took out his bo staff.]
April: Careful, Donnie! That's a dangerous mutant!
Donnie: That makes two of us!
[Donnie tries to hit him, but the monkey [also the first mutanimal] knows every move and dodges him away. The monkey sniffs the staff and throws it aside.]
April: Donnie, are you okay?
Donnie: I'm good.
[He tries to attack but the monkey starts fighting him, Donnie throws his ninja stars but the monkey dodges and starts to attack him.]
Donnie: Monkey! Oh, okay! Whoo!
April: [horrified] Donnie?
Donnie: I was just figuring out his timing. He is gonna regret that-[getting punched] Ow! That too! And that! Got a lot of regrets, monkey!
[He falls as the monkey leaped on top of him and started beating him up like a crazed animal.]
Donnie: Hey, come on! Hey, ow!
[The monkey throws Donnie away to the ground, injuring him. April heads over to Donnie's side as the mammal approaches her. He grabs her and roars. But then it had a scared expression on its face.]
April: It's okay. Everything's going to be alright.
[The monkey calms down, letting April go.]
April: What? What is it?
[The monkey screeched, and ran away. April goes over the injured Donnie.]
April: Donnie, are you hurt?
Donnie: [weakly and shaking] Just my pride. And my internal organs.
[Later, April gets Donnie to the lair.]
April: Come on.
Raph: Whoa, what happened?
April: Donnie got beat up by a lab monkey.
[Leo grabs Donnie and puts his arm around his shoulder.]
Leo: April, can you get an ice pack?
[April nods and leaves as Leo leads his younger brother to the couch. Then April heads off to get an ice pack.]
Leo: Donnie, you gonna be okay?
Donnie: [weakly] Yeah. Yeah, I'll be fine.
Leo: In that case...
[The Turtles started laughing cruelly at their brother's humiliation, making Donnie so uncomfortable.]
Raph: You got beaten up by a monkey In front of your girlfriend?
Donnie: She's not my girlfriend! And that monkey was a vicious mutant!
Leo: Yeah, I'm sure he went bananas! [laughing again] No, no, no, no, no. He went ape!
Mikey: Monkey!
[April comes back with an ice pack. The turtles stop laughing.]
Raph: No more monkey puns.
[April stares at them before she puts the ice pack on his head. Donnie laughs weakly.]
April: [to the turtles angrily.] Are you laughing at him because he's hurt?
Mikey: No, we were laughing at him because he was hurt by a monkey! [laughter]
[Later on, Donnie laments how he failed miserably to the monkey.]
Donnie: I just don't get it. I mean, I'm a highly trained martial artist. How could I lose to something so mindless?
[Donnie, in anger, swags the water, which splashes as Splinter walks over to him.]
Splinter: You are very intelligent. But in a fight, you cannot be up here.
Donnie: But I just don't understand how you can fight without thinking.
Splinter: Observe.
[Splinter tries to attack but Mikey dodges since he was listening to music. Donnie was speechless.]
Splinter: You see? Mikey does not think.
Mikey: Thank you.
Splinter: You're welcome. [easily flicks his tail and trips Mikey.] You must find the space between your thoughts and learn to live there. That's what Michelangelo does.
Donnie: True, but Mikey's got a lot more space between his thoughts than I do.
Mikey: Oh, a pepperoni!
Splinter: Yes, well, Michelangelo has his challenges, too.
[Meanwhile, April is looking at her laptop.]
April: Guys, I think I've found something. These notes are hard to follow, but it looks like Rockwell was able to modify the mutagen.
Leo: Why would he do that?
[The screen shows how the blue stuff makes a person powers.]
April: He thought he could use it to create a neurochemical that would temporarily give someone psychic abilities.
Raph: You mean that monkey was psychic?
April: It's more like he was reading our emotions. After all, he was only hostile when Donnie was hostile.
Donnie: Yeah, well next time, I'll be sure to think friendly thoughts while I'm beating a little sunshine into him.
Leo: Okay, we need to track him down before he attacks someone else. Let's go up to the surface, spread out, and search.
Raph: How are we gonna stay in contact?
Donnie: I have a little something that might help. Gentlemen and lady, I give you The T-Phone!
[He pulls out a phone.]
Mikey: Dude, I'm in charge of naming stuff. I would've called it The T-Phone.
Donnie: I did call it the T-Phone.
Mikey: Yeah, but I would've called it the T-Phone.
[Raph whacks him]
Donnie: And April, if you give me your cell number, I can patch you into our network.
April: Sweet!
Donnie: See that? [whispers] I got her number.
Raph: Her number's on the fridge, you dork.
[Later outside, April held up her phone.]
April: Guys, someone just spotted the monkey on Bleecker.
Raph: [running across the rooftop] I think I'm on his trail.
Leo: Mikey, the monkey is headed your way.
Raph: I've got eyes on him. He's headed south on Delancey!
Donnie: I'm on Houston! I'll cut him off! Where'd he go?
[The monkey is hiding behind the building.]
Leo: He changed direction. Mikey, the monkey is headed your way!
[Mikey, who was playing games on his phone, spots the monkey.]
Mikey: I'm on it!
[Mikey gets onto his skateboard. and tries to catch the monkey with his nunchucks, only to crash on the lamp post. Raph goes after him next. Leo then joins him. The monkey runs past Mikey who also follows after him. The others meet up.]
Leo: Anybody see where he went?
Donnie: I thought he headed off in that direction.
Raph: I thought it was that way.
Mikey: Here, monkey, monkey, monkey, monkey!
[April senses the monkey's presence nearby and looks through the dumpster and finds the monkey cowering. She offered a hand as he gently climbed out. Then the turtles caught him with the chain. The monkey roars in anger.]
Mikey: Gotcha that time!
Raph: Great, we got the monkey. But we're not any closer to finding Dr. Rockwell.
[April looks as the Monkey roars...but then April checks him, realized, to her shock,]
April: Actually, we're a lot closer than you think.
Donnie: What? How?
April: I think this is Dr. Rockwell!
[The Mutant Rockwell watches them in concern. Later that night, Rockwell is brought to the lab. Falco calms him down by hitting him with an injection.]
Falco: There. That should calm him down a little. Poor Rockwell.
April: Is there any way to get him back to normal?
Falco: I wouldn't even know where to begin. But I'll see if there's a way to give him some semblance of a normal life.
[The turtles and April watch each other, Mikey is seen smiling, believing that the mutated scientist is in a better place as we cut back to the lair.]
Mikey: Man, this asteroid field is tough. I just can't beat it.
Raph: Pizza's here!
[Raph sets the pizza down on the table]
Mikey: Must eat pizza. But can't stop playing. But must eat pizza. But can't stop playing! But must eat pizza!
[Mikey yells then bites the pizza while continuing playing the game.]
Leo: Sorry we didn't get any closer to finding your Dad, April.
April: It's okay. Everything we learn about the Kraang is another piece of the puzzle.
Leo: Yeah, but psychic research? This is one weird puzzle.
Splinter: I am curious, April. How did you know the monkey was really a human?
April: I don't know. Sometimes I just get a feeling about things.
Splinter: A feeling? Hm. Interesting.
[Leo noticed Donnie.]
Leo: Hey, Donnie, how come you're not eating?
Donnie: What? I'm not hungry. Something's been bothering me. Falco said that Rockwell was experimenting on a monkey.
Leo: And?
Donnie: Well, according to these notes, he never had a monkey in his lab. He was just using samples of monkey DNA.
Leo: [uncertain] We're still not following you.
Donnie: If he never had a monkey, what broke out of that cage?
Raph: [realizing] It must've been Rockwell!
Donnie: Which means Falco put him there and he's been lying this whole time!
[Raph glares at Leo, who glares at all of them, with a great determination to find out more about Falco's true intentions. We cut back to the lab, Rockwell is seen peacefully sleeping. When Falco enters he injects Rockwell again, the latter screeches in an unbearable pain.]
Falco: Oh, stop struggling, Tyler. You were always so dramatic.
[He injects himself with the blood into his neck and gains his powers. The lights turned on, revealing that the turtles have arrived.]
Leo: All right, Falco! We've had enough of your-
Raph: Do not say "monkeying around. "
Leo: I wasn't going to.
Falco: Yes, you were.
Donnie: It's over, Falco! We know it was you who mutated Rockwell!
Falco: I used him as a guinea pig.
Mikey: Well, it didn't work. You turned him into a monkey.
Falco: The psychic neurochemical I extracted from his mutant brain is changing me. Your minds are opening up to me.
Donnie: So this was your plan all along.
Falco: Of course. No man can defeat you when you know his every thought.
Raph: Oh, really? Then you must know I'm gonna smack-
Falco: Smack the white off my lab coat? How humorous!
Raph: Lucky guess! Hi-yaah!
[Raph attacks but Falco easily dodges.]
Raph: What?!
[Raph tries again but Falco dodges his moves and knocks Raph knocked down with his own sai he took. Raph landed onto the turtles, knocking them down. Leo goes next, swinging his sword. Donnie and Mikey recover.]
Mikey: Whoa! It's like he's psychic!
Donnie: He is psychic, shell brain. That's what he just said.
Mikey: Oh, yeah, I kinda tuned out when he did his whole "I'm evil, blah, blah, blah" thing. Heh.
[Leo continued on only for Falco to dislodge his swords with Raph’s sai. He threw the swords Donnie and Mikey jumped out of the way before Leo was knocked out.]
Donnie: How are we going to defeat him if he can read our minds?
Mikey: No prob. I'm good at this. I just have to fight without thinking! Wait a minute, how do I fight without thinking? Oh, no! Now I'm thinking about not thinking!
[Falco knocks him out. Donnie is now the only one standing.]
Falco: A man who can read minds is unstoppable. Once I dispose of you, no one will be able to stand in my way.
Donnie: We'll see about that.
[Donnie drew his bo staff and charged. Falco easily dodges Donnie's Bo and swings him to the wall. The purple turtle groaned in pain.]
Falco: I really must admire that complex brain of yours. You come up with so many ideas. Too bad I can see them all coming. By the way, do you really think you have a chance with April?
Donnie: [to himself softly] I can do this. Just have to fight without thinking. No thinking. No thinking. Don't think. Just do.
[Donnie charges at him, Falco uses extrasensory techniques, but to his shock, Donnie fights it. As Donnie gives him the good fight, kicks the man to the wall, punches him repeatedly and smacks him down against the wall, knocking the man out unconscious. Donnie receives his staff as the others regain consciousness.]
Raph: Whoa, Donnie, nice work!
Mikey: [holding the mutagen] Ha! What'd I tell you about those back flips, huh? Pretty cool!
Donnie: Now that we have the ooze, let's see what Falco knows about the Kraang.
[Donnie looked and realized that Falco was gone!]
Donnie: Falco's gone!
Mikey: What do we do about him?
[Donnie sets Rockwell free. Before he left, he looked at Donnie.]
Donnie: I'm no psychic, but I think he's trying to thank us.
[The mutant begins to leave.]
Raph: Um, if he reacts to angry thoughts, is New York city really the best place for him?
Man: Hey, monkey! Get outta the-
[Crashes and tire screeches can be heard.]
Leo: I'm sure he'll be okay.
[Later back at the lair.]
Splinter: April, it seems you have a rare gift, a sensitivity I have trained my entire life to develop.
April: Don't worry. You'll get it.
Splinter: I did! It just took me a long time.
April: Uh, that's nothing to be ashamed of.
Splinter: What I am trying to say is that I would like to train you to be a Kunoichi, a female ninja.
April: Wow! That's quite an honor. If I do this, does that mean I can kick everybody's butt?
Splinter: We don't believe in using our abilities that way.
April: Oh oh, yeah! Me neither. But I could, right?
Splinter: Yes. But I warn you. It will be the hardest thing you've ever done. It will drain you mentally, physically, and spiritually.
April: Well, can't be worse than high school.
[April leaves the dojo.]
Donnie: Hey, April, you, uh, wanna hang out tonight?
April: That sounds great, Donnie, but I can't. I'm training with Splinter to be a Kunoichi.
Donnie: Oh. If training with Splinter Well, then, maybe we can train together sometime.
April: Sounds great!
Donnie: You see? My flowchart is awesome!
[Raph rolls his eyes in annoyance as the episode ends.]