The Mutation Situation

Leonardo: It seems like you been avoiding us lately, April.

April: It's not my fault. Dad's alien abduction nightmares are getting worse. He barely let's me out of the house.

Kirby O'Neil: I'm sorry, April. It's just... What if the Kraang are still out there? I'll do anything to protect you.

Leo: Guys, I think that mutant was Mr. O'Neil.

Raphael: How do you know?

Leo: You see many red-bearded, middle-aged bats running around Manhattan?

Invasion of the Squirrelanoids

Follow the Leader

Karai: You know, I bet I'd make a small fortune if I sold you to a science lab. Could you imagine the press? "Talking Ninja Turtle found in sewer."

Leonardo: Great. Captured and now totally humiliated. Awesome day, Leo. Awesome day.

Karai: You deserve everything you're getting, Leo! After you betrayed me last time!

[Karai snaps her fingers and Footbots sit in position around the cage.]

Karai: Don't you love it? My new robotic Foot Bots follow my orders to a "T." No arguing, no prodding. They do whatever I want. Cool, right?

Leonardo: Yeah, convenient. Nice.

Karai: I've been teaching the Foot Bots new skills, but now I'm turning the training over to someone new.

[Karai frees Leo and gives him his swords.]

Karai: Footbots, de-shell him!

Foot bots, de-shell him!

Leonardo: I'm sorry to bother you, Master Splinter. I need to ask you some questions- about Karai.

Splinter: It is late, Leonardo. These questions will have to wait for another time.

Leonardo: She said you took her mother away from her. I know it's not true, right?

Splinter: No. It is not true. But the truth is just as difficult.

Leonardo: Please, sensei, tell me. Trust me.

Splinter: Karai... is my daughter.

Mutagen Man Unleashed

Mikey: [after stealth attack from Leo] What was that?

Leo: THAT, was a stealth attack. And that is what we're gonna be doing in today's training session.

Mikey: No fair! I couldn't see you coming!

Raph: That's why it's called 'stealth', genius.

Donatello: Why would you eat a slice of pizza you found on the roof anyway?

Mikey: Roof pizza is like one of my top ten favorite types of pizza.

April: [faced with Mutagen Man] Donnie's monster?! Can't I go a WEEK without some mutant attacking me? [Casey gets in front of her] What are you doing?

Casey: Whatever that thing is, it's pure evil, and completely cool looking!! I'll handle this, sweetheart.

April: "Sweetheart"?

Mikey Gets Shellacne

Karai: Bradford, Xever. Enter.

Dogpound: I detest this clumsy body. What I wouldn't give to be human again!

Karai: Seriously, I don't have all night.

Fishface: Don't get too comfortable, Karai. Shredder is the only one worthy of that throne.

[Dogpound put a mutation leash on Baxter Stockman]

Baxter: Is this...mutagen!

Dogpound: I call it insurance. Double-cross us, and boom, we see what you turn into! Maybe some sort of bug.

Target: April O'Neil

[A hologram of Oroku Saki is seen]

Shredder: So, Daughter. You not only disobey my orders in my absence, your petty scheme failed miserably.

Karai: It was those stupid Footbots! They couldn't keep up with the Turtles! But here's the good news- the Kraang have been upgrading them.

Shredder: Hear me, Karai. You will not have anymore dealings with the Kraang until I return. Do not defy me again! The consequences would be...unfortunate.

Karai: Understood, Father.

Splinter: It is good to see you again, April.

April: Me too, Sensei. I hope we can pick up training again soon.

Splinter: Of course.

April: I wanted to apologize.

Leonardo: You're sorry? But we were the ones that screwed up.

April: It was an accident. And most importantly, you're my friends. I don't ever want to hold a grudge.

Slash and Destroy

Raphael: Why!? Why are you doing this!!?

Slash: The others hold you back. Limit your potential. You don't need 'em. Just like you said!!

[Slash drags a badly hurt Mikey to the edge of a skyscraper]

Raphael: You're wrong! I never wanted this!!

[A dejected Raph looks at his photograph of Spike]

Raphael: He's still out there somewhere.

Splinter: Raphael, do you know what I do when I miss my loved ones from the past?

Raphael: No.

Splinter: I focus on the friends I have in the present.

The Good, the Bad and Casey Jones

Raph: What are you doing Leo!? I was goin' for Mikey!

Leo: What part of "last Turtle standing" don't you understand!?

April: These are the other friends I told you about. Casey meet Donatello, Michelangelo, Leonardo, and the one and only Raphael.

Casey: So the Turtles are all Italian?

Splinter: No. I named them after my favorite painters and sculptors of the Italian Renaissance.

Casey: He's a giant, t-talking rat? [faints from shock]

April: Casey! Casey? This is Master Splinter, Casey. He's cool.

Splinter: You do not have to fear me, my friend. Rest assured, I do not bite.

The Kraang Conspiracy

• April O'Neil's psychic and extrasensory abilities, which were hinted in "Monkey Brains", are fully proven.

April: Saved by Raph? I'm never gonna live this down.

Raph: We've all been there, April.

Donnie: This...doesn't seem possible.

April: What is it? What’s wrong?

Donnie: Based on all the evidence I’ve clued from the lab, your cellular makeup is actually a morph-genetic blend of human and Kraang DNA.

April: Wait. Are you saying...?

Donnie: You're not entirely human, April. That's why you have psychic powers. In fact, you are a half human, half alien-mutant.

Leo, Raph and April: A mutant!?

Mikey: Oh, yeah! Welcome to the family!

Fungus Humungous

April: You know, Casey, it's awesome there's someone else who knows about the Turtles. I have, like, no one talk to. Especially after Dad turned into a mutant-bat.

Casey: I know. 4 mutant-turtles living a sewer with a talking rat? I mean, you couldn't make this stuff up.

Splinter: Leonardo?

Leo: [falls over in surprise] Sorry, Sensei. Can't seem to focus.

Splinter: I noticed. What is it that troubles you, my son?

Leo: I keep having the same nightmare, Sensei - every night! I let the team down. They're dragged off into darkness and I'm powerless to help.

Splinter: This is not uncommon. All leaders must face the fear of losing their team. I face this every time you and your brothers' leave the lair.

Casey: [runs into the lair, panting] Guys! April! Sewers! Hurry!

Raph: Casey, what's wrong?

Leo: Are the Foot bots back?

Casey: W-we were on our way here, and next thing I know April starts acting freaked out, then runs off! She's gone!

Donnie: Wait, wait… You just lost April!?

Mikey: Relax! I'm sure there's a logical explanation. Like she was eaten by a giant sewer snake, or something.

Donnie: Let's go!

Leo: What is going on here?

Donnie: Fungus!

Mikey: Language, please! There's a lady present.

Donnie: April and Raph have been exposed to toxins found in certain types of fungi. The mushroom must produce it as some kind of defense mechanism.

Leo: Defense against what, being stir-fried?

Raph: [hallucinating them as giant cockroaches] I'm freaking out, I'm freaking out, I'M FREAKING OUT!

Mikey: [stomping mushrooms] Check it out! Super Mikey Brothers!

Donnie: [coughing] April, we need to get out of here! Take my hand! (Paril?)

Hallucination-April: Don't touch me! Get away from me! You make me sick, mutant... weirdo!

Donnie: April… what's wrong with you?

Hallucination-April: You nerdy 3-fingered freak, I hate you! You mutated my father! I NEVER WANT TO SEE YOU AGAIN!

Donnie: She hates me. April hates me!

Leo: Everybody's gone… It's my fault! I failed them! It's all my fault!

Hallucination-Captain Ryan: [slaps Leo] It's your fault, Cadet Leonardo! You blew it! What kind of a leader are you? Are you a man, or a turtle or a 0?

Leo: Ugh… Where am I?

Hallucination-Mikey: You let us down, bro!

Hallucination-Donnie: You did this!

Hallucination-Raph: It's your fault, Leo!

Leo: NO! No! C'mon, fight your fear, Leo! Get your head straight… FIGHT IT!

Raph: [sees Mikey] Mikey. Oh, I'm so glad to see you. What the heck's happening to us, man?! [Mikey says nothing] Uh, you okay? [Mikey's head pops off and out comes cockroaches] I'LL BURY YOU, COCKROACH!

Mikey: KEEP AWAY FROM ME! STAY BACK! I WON'T LET YOU TAKE MY BRAIN JUICE!

April: STOP FOLLOWING ME, DAD!

Donnie: NO, LEAVE ME ALONE! I DON'T WANT TO HEAR ANYMORE!

Hallucination-April: What's the matter, freak, scared?! Maybe I should put you out of your misery.

Metalhead Rewired

Leonardo: Donnie, you gotta turn off his A.I.

Donatello: Turn off his A.I.? That's like turning off his brain!

Leonardo: He's too dangerous.

Donatello: He has to keep it open for us.

Leonardo: But what about him?

Donatello: We don’t have a choice.

Of Rats and Men

Michelangelo: Can we keep her?

Donatello: You know, Master Splinter is a rat.

Casey: Yeah. What if that cat goes nuts and attacks him? She'll feed of his body for months.

Donatello: You know, there is something seriously wrong with you.

Splinter: You think you have the upper hand in a situation. You do not.

Mikey: Burn!

Raphael: How's that floor taste, Lame-nardo?

Splinter: It is not hard to sense loudmouths.

The Manhattan Project

Mazes and Mutants

Splinter: A game? Don't you have mutagen to find?

Donnie: Sensei, we've beaten the Kraang and Shredder's top henchman. We could use one day to relax.

Leo: If we imagine our weapons are magical and all-powerful, we can defeat Leatherhead.

Mikey: Yes! That's the answer!

Raph: But that makes no sense!

Leo: Trust me. Believe! Focus! Use your imagination.

The Lonely Mutation of Baxter Stockman

Donnie: I'm sorry, Sensei. This is all the retro-mutagen I have left.

Splinter: I may not be human, but I am fortunate enough to have my humanity. Save Kirby.

(As Donnie leaves, he looks down at the black-and-white picture of his original human self and his late wife, Tang Shen, with their infant daughter Miwa between them)

Donnie: I'm sorry, Master Splinter. I wanted to change you back. But I swear, if it's the last thing I do...

Splinter: Do not fret, my son. I am content with what I have become. I have no place in the human world anymore. This is my home, and you four are my family.

Newtralized!

[Leo and Mikey glare]

Raphael: What!? If he wants to act like a big baby, I don't want his help!

Michelangelo: Not cool, Raph. People have feelings, dude. Real squishy feelings.

Raphael: Well, I'm not people!

Newtralizer: We can destroy this whole stinkin' city.

Slash: And every innocent human with it. Are you crazy!? I'm here to take out Kraang! Not people!

Neutralizer: I don't care! I'm not people.

Michelangelo: Hmm. Sounds oddly familiar.

Pizza Face

Mikey: Something definitely is wrong! There isn't a single pizza place in this town that's pickin' up.

Raph: Just wait for the pizza guy, Mikey! And don't eat it! I repeat: Do not eat it!!

The Wrath of Tiger Claw

Karai: All my life I was raised to believe Shredder was my father, that Splinter was the enemy. So when Leo told me Splinter was my true father, I couldn't accept it. But then I began to have doubts about Shredder's honor.

April: Doubts about the evil villain of the Foot clan?

Karai: He's trying to use me to set a trap for the Turtles. But I can't. Even if it means betraying Shredder.

Splinter: I retained very little from my old life. But this I will never let go, my daughter.

[Karai is shocked to see the full picture of her late mother's arm around Hamato Yoshi, and the black-and-white one of herself as an infant between a human Splinter and Tang Shen]

Karai: I can't believe it. You're telling the truth. All these years the Shredder has been lying to me.

Leonardo: Wait. You don't believe it? I thought you did believe it. If you didn't believe it, why did you come down here?

Karai: Father, what have I done?

The Legend of the Kuro Kabuto

Leonardo: How can you guys fool around like this when Karai needs our help?

Raph: Not this again.

Leo: We have to rescue her.

Raph: Look, maybe she believes Splinter is her father. But she was still raised by Shredder. You think she's gonna turn on him just like that?

Leo: Yeah, I do. Now am I the leader of this team or not?

Raph: More or less.

Leo: More or less? So I'm only the leader until I tell to do something you don't want to? Thanks, guys.

Shredder: Why does the fly walk into the spider's web?

Leo: Because all the spider's henchmen are out.

Shredder: Ah. You wish to make a trade?

Leo: The helmet for Karai!

Shredder: Very well. She'll have to be brought up from the dungeon.

Leo: You raised her from infancy and now you lock her in a cell? How can you do that?

Shredder: In any conflict, the winner is prepared to do what the loser is not.

Plan 10

Mikey: Wait a minute. How do we know it's the real Raph? What's the secret password?

Raph: I will pound you, Mikey!

Vengeance is Mine!

Splinter: Not what you expected?

Karai: I admit it's a little weird being with...people I was told were my enemies. What really happened between you and Shredder and my mother?

Splinter: I'm afraid it goes much deeper than our rivalry over your mother. The bitter feud between the Hamato and Foot clans lasted centuries. Oroku Saki was the son of the enemy. But he was just a child, so my father gave him shelter. We were raised as brothers, and rivals in all things as brothers are. But that rivalry soon turned bitter when we met Tang Shen- your mother. Jealousy became hatred when Saki learned of his true heritage. He swore vengeance and rebuilt the Foot clan. One night, Oroku Saki struck. The blow that was meant for me struck your mother instead. Shredder blamed me and in his rage, he burned our home to the ground, leaving me to my fate. He took you away from me.

Karai (silently seething): After all this time haven't you wanted revenge?

Splinter: After all this time, I have learned that revenge only leads to more pain.

Karai: But I seen you fight, Father. You could take him out.

Splinter: We are safe here. And we are finally together again, my daughter. That is all that matters now. Not revenge.

Leo: Going after Shredder alone is a bad idea.

Karai: Don't try to stop me, Leo.

Leo: I want to go with you.

Karai: What?

Leo: You're right. Shredder will never stop hunting us. The only way for us to be safe is to take him down.

Karai: So much of my life has been about revenge. I can't ask you to risk your life, too.

Leo: Let me help.

(Karai leans closer as if she's going to kiss him. He looks a little shocked and nervously looks around)

Karai: Sorry, Leo.

(she punches him, then knocks him out with some blinding powder. Leo coughs as his eyes remain open as he falls. Karai quickly heads to the surface)

Karai: This ends tonight!!

A Chinatown Ghost Story

Ho Chan (to April): You have great power in you, power you have barely tapped. It will belong to Ho Chan.

(Turns to Irma) And you. You have power, too. Power I do not understand...yet. You will explain this power or suffer my-What!?

(April uses her Tessen fan)

April: Come on, Irma!

Ho Chan: It is said that the Great Turtle helped the god create the world. Fitting that these turtles should help Ho Chan rule it.

Into Dimension X!

Leatherhead: Turtles, the Kraang have perfected the mutagen.

The Invasion

Main

• Leonardo / Leo
• Raphael / Raph
• Donatello / Donnie
• Michelangelo / Mikey
• Hamato Yoshi/Splinter
• April O'Neil
• Casey Jones (debut)

Recurring

• Oroku Saki/Shredder
• Hamato Miwa/Karai (11 Episodes)
• Fishface
• Dogpound/Razar
• Baxter Stockman/Stockman Fly
• Tiger Claw (debut; 7 Episodes)

Supporting

• Slash (debut; 2 Episodes)
• Tang Shen (photographs/flashbacks; 8 Episodes)
• Dr. Kirby O'Neil (7 Episodes)
• Mrs. O'Neil (photograph; "The Kraang Conspiracy")
• Timothy/the Pulverizer ("Mutagen Man Unleashed")
• Dr. Falco/the Rat King ("Of Rats and Men")
• Ivan Steranko
• Anton Zeck