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Bishop: It pains me how far you've fallen, Knight.
Kraang Subprime: That name means nothing to me! I am now Kraang Subprime!
~ Kraang Sub-Prime fights against his brother, Bishop.

Kraang Subprime, formerly known as Knight and Irma Langinstein, is a major antagonist in the 2012 Teenage Mutant Ninja Turtles series. He is appears as one of the two secondary antagonists of Season 2 (alongside Tiger Claw), a major antagonist in Season 3 and a posthumous antagonist in both Seasons 4 and 5.

He is an Utom warrior and former member of the Utrom High Council that betrayed his kind to Kraang Prime, becoming second-in-command of The Kraang. Throughout Season 2, he took the guise of April O'Neil's best friend Irma Langinstein in order to spy on her and discover the Turtles' lair, and later became a reoccurring opponent of the Turtles. In "Trans-Dimensional Turtles", it is revealed that he is Krang's cousin.

He was voiced by the late Gilbert Gottfried, who also voiced Dr. Bender in The Fairly OddParents, Contorno in The Ren & Stimpy Show, Mr. Mxyzptlk in Superman: The Animated Series, Iago in Disney's Aladdin, and Berkeley Beetle in Don Bluth's Thumbelina. As Irma, he was voiced by Kate Micucci.



Irma dresses in a Gothic style of clothing. She has black hair, which is cut short and has purple streaks. She wears bracelets on both of her wrists, a black tank top with a checkered pattern skirt, large boots that go up her calves and red oval-shaped glasses. She is slightly shorter than April.

Kraang Subprime

He has a left cyber-optic eyepiece a prosthetic claw in his front left tentacle, a scar across his face and a blue tattoo around his right eye.

His exosuit is much taller and wider than his brethren, and retains vestiges of Irma's "body", such as her head and arms. The head can detach and grow spider-like legs.


In "Mousers Attack!", Irma made a cameo on April's caller ID prior to her first in-person appearance,

In "Mutagen Man Unleashed", Irma makes her first in person appearance here, she is shown at her locker but her face cannot be seen and she has no speaking role.

In "The Good, The Bad and Casey Jones", Irma makes her first speaking appearance in this episode. She is shown as April's best friend, walking with her in the hall. She asks Casey where he got his bruises, and doesn't seem to like April hanging around him for unknown reasons.

In "Of Rats and Men", Irma played a larger role in this episode. She was kidnapped and put into a cage along side Casey Jones. The Rat King wanted to test the mutagen on her first to create his army.

In "Pizza Face", Irma appears hanging out with April, about to see a zombie movie when her friend get a call from her T-Phone. She didn't believe the "dating with Casey" excuse, she already knew that April has some secret friends that she don't tell about. They both get hit by a pizza guy's bike, who exclaimed that he's being attacked. He leaves a pizza box, which April get it for the guys and run off. It made Irma feel bad because her friend ditched her again with no honest reason. However, it turns out that it was likely Subprime being upset that he needed to stop spying on April for the time being.

In "The Wrath of Tiger Claw", Irma is hanging out with April and Casey (who complains about her being a third wheel and it being a ruined date) after seeing a movie. April then senses Tiger Claw and Karai who are following them. April (who is being chased by Karai) and Casey (who gets ambushed by Tiger Claw) split up to deal with them leaving Irma confused and frustrated with the both of them and unaware of the situation.

In "A Chinatown Ghost Story", Irma and April are captured by Ho Chan because he needed April's powers. He also says Irma has powers, but he doesn't know which one forshadowing the reveal.

After being ambushed by Foot-Bots in The Invasion, Part 1, a panicked April takes Irma to the Turtles' Lair. There, Irma's body begins to split apart and reveals to be the android body of Kraang Subprime, the Kraang second-in-command and a master spy. He opens portals, allowing other Kraang into the lair. The lair becomes ruined in the scuffle, and the Turtles and April are forced to retreat while Splinter holds off the invasion. Kraang Subprime is defeated when a piece of the burning lair falls on top of him.

He returns in "Battle For New York". The Mighty Mutanimals attack him and the other Kraang, but he launches a rocket that is filled with mutagen, so he can mutate the world. He followed The Turtles into Dimension X. He tries to destroy them. When the turtles got into a Kraang ship, he told the other Kraang to unleash the Dracodroid. The Turtles got away from the Dracodroid. T Kraang Subprime got into the ship and tried to destroy The Turtles, but The Turtles were teleported back to earth by The Mighty Mutanimals. The ship crashed into a Technodrome and exploded.

He returns in "Annihilation Earth Part 1" where he is once again alive and was trying to fix the Technodrome with Kraang Prime but failed, later he did succeed in the second time were the turtles and Leatherhead are captured, just before they could start their Invasion the Triceratons then appeared and destroyed the Technodrome with him and Kraang Prime in it. This results in their deaths as their main timeline versions are never seen again.

In "The War for Dimension X", Subprime is shown at a gathering with the Salamandrians to attack the Triceratons, until they mention the Turtles which prompts him to capture them. Later, he discovers the location of the Utrom base and attacks kidnapping their leader, Queen. he is then cornered in his base until he unleashes a Dracodroid on them which then evolves into an all out battle between the Utrom and the Kraang. he then attacks Bishop in a duel which ends with Subprime seemingly meeting a fiery end at the hands of his own Dracodroid.

In "Trans-Dimensional Turtles", Kraang Sub-Prime also serves as the main antagonist. He finally allowed Krang, to return back, which sets off the plot of the episode. In the middle of the episode after the fight him in the 2012 and 1987dimensions, Subprime hacks into Donatello's portal ray, sending them to Krang's Technodrome. It was there that it was revealed that he and Krang are cousins, and apologized for banishing him to the 2D earth of the 1987 ninja turtles. After the collective turtles make short work of their Kraangdroids, he and Krang follow them to the 2D earth to try and stop them. They then teleport back to the Technodrome, where once again the turtles fight and defeat Sub-Prime's forces. Shortly after, the turtles reveal the that the dimensionizer would've destroyed the realities that the Kraang have been trying to mutate for thousands of years, something Sub-Prime had no idea of. He chastises Krang for his insanity and stupidity, and banishes him back to the world of the 1987 ninja turtles, shortly before the turtles defeat him and send him to the Prime Turtle dimension.


Lowly insects, kneel before the genius of Kraang Sub-Prime, greatest Kraang spy in all of dimension X! The discovery of the lair was the final component, needed to launch full scale invasion!
~ Kraang Subprime after discovering the turtle lair.
You guys are as dumb as a box of rocks! Seriously! What's taking you so long? It's been three months! (Kraang: Much of Kraang's Mutagen supply was spent in the invasion of a city known as New York City.) What is it with the "Kraang's invasion of the city" known as New York City"?! What is that?! We've been here for thousands of years, YET CAN'T EVEN SPEAK PROPER ENGLISH!? (Kraang: Kraang does not understand the query known as Kraang Subprime's query.) I should vaporize your sorry, pink, tentacled butt for insubordi what? Come on, fellas! Keep moving! I am surrounded by incompetence!
~ Kraang Subprime exaspiring by the stupidity of his kind.
Well, if it isn't the Turtles and that stupid alligator thing that shouts "Kraang" all the time.
~ Kraang Subprime after the captures of the Turles and Leatherhead.
Bishop? You filthy, swindling Kraang! (Bishop: I am an Utrom, just as you once were, brother. Or shall I call you Sub-Subprime?) Don't call me that. You know I hate that!
~ Kraang Subprime to Bishop.
Blow up realities? You've been trying to wipe out dimensions we've been trying to mutate for thousands of years?! Are you insane?! (Krang: Well, you did say wipe out the Turtles at any cost.) This is why I banished you to Two-Dimensional Earth in the first place. Because you're an idiot! A moron! A dingleberry! So you know what?! I'm kicking you back! (Krang: Oh, no. Not again!)
~ Kraang Subprime banish Krang once again.



  • Possibly due to being an Utrom the defected to the Kraang, Kraang Subprime is the only member of the Kraang to speak proper English. He and Kraang Prime are also the only two Kraang to be able to speak without using a suit.
  • Despite being his second-in-command, Kraang Subprime makes far more appearances in the series than Kraang Prime himself, and, from Season 3 onwards, is shown to be more heavily involved in the Kraang's plans to take over Earth.


           Tmnt-51e57cb534568.png Villains

Shredder (Mirage, Archie, IDW, Mirage Comics, Raphael, Doctor Shreddarius & Lady Shredder) | Foot Clan | Foot Elite | Karai | Ch'rell | Baxter Stockman (Archie & IDW) | Krang (Archie & IDW) | Hun | Purple Dragons | Adolf Hitler | Ninjara | Slash | Leatherhead | Triceratons | Commander Mozar | Zanramon | Shredder Clones | Tokka & Rahzar | Alopex | Kitsune | Koya | Bludgeon | Rat King | Agent Bishop | Bebop and Rocksteady | Savanti Romero | Skonk | Darius Dun | Tatsu | Master Sliver | General Tragg | Dragon | Null (IDW Version) | Maligna (IDW Version) | Craniac | Armaggon | Old Hob | Master Traquer | Johnny Lee Raeburn | Punk Frogs | Jasper Barlow

1987 TV series: Shredder | Bebop & Rocksteady | Baxter Stockman | Krang | Rat King | Lord Dregg | Antrax | Barney Stockman | Don Turtelli | General Tragg | Groundchuck & Dirtbag | Krangazoids
1997 TV series: Foot Clan (Shredder) | The Rank (Dragon Lord | Wick | Dr. Quease | Good Dragon | Rank Lieutenant | Clone Turtles) | Simon Bonesteel | Silver | Monkey Thief Mick and Monkey Thief Dick | VamMi | Bing | Chi Chu | Heavy Duke
2003 TV series: Utrom Shredder (Future Self, Tengu Shredder & Cyber Shredder) | Karai | Hun | Baxter Stockman | Agent Bishop | Rat King | Drako | Ultimate Ninja | Darius Dun | Sh'Okanabo | Dark Turtles | Viral | Torbin Zixx | General Blanque | Zanramon | Commander Mozar | Lonae | Dr. Chaplin | Mr. Touch and Mr. Go | Abigail Finn | Parker | Harry Parker | Kluh | Ammag | Levram Wizard | Dragon Face | Johnny | Two Ton | Yukio Mashimi | Moriah | Weasel | Master Sliver | Savanti Romero | Skonk | Triple Threat | Nano | Mephos | Boss Zukko | High Mage | Lord Hebi | The Brotherhood (Councilor) | Garbageman | Necro Monster
2012 TV series: Foot Clan (Shredder, Karai, Tiger Claw, Rahzar, Fishface, Bebop, Rocksteady, Baxter Stockman, Antrax, Shredder Mutants/Mega Shredder, Hattori Tatsu, Chrome Dome & Koga Takuza) | The Kraang (Kraang Prime & Kraang Subprime) | Triceraton Empire (Emperor Zanmoran & Captain Mozar) | Lord Dregg | Armaggon | Savanti Romero | Newtralizer | Slash | Kavaxas | Rat King | Purple Dragons (Hun & Fong) | Don Vizioso | Snakeweed | Spider Bytez | Overmind | Za-Naron | Dracula | Justin | Mutagen Man | Pizza Face | Dream Beavers | Speed Demon | Squirrelanoids | Chimera | Spy-Roach | Maximus Kong | Verminator Rex | Jei | Wyrm
Rise of the TMNT: Baron Draxum | Albearto | Baxter Stockboy | Big Mama | Meat Sweats | Hypno-Potamus | Foot Brute | Foot Lieutenant | Warren Stone | Repo Mantis | Evil League of Mutants | Shredder | Krang (Rise of the TMNT)

TMNT 1 & 2: Foot Clan (Shredder, Danny Tatsu, Tokka and Rahzar)
TMNT 3: Walker | Lord Norinaga
TMNT (2007): Stone Generals (Aguila, Gato, Mono & Serpiente) | Foot Clan (Karai)
TMNT (2014): Foot Clan (Shredder, Eric Sacks, Karai & Baxter Stockman)
TMNT: Out of the Shadows: Krang | Foot Clan (Shredder, Karai, Baxter Stockman, Bebop and Rocksteady)
Batman vs. TMNT: Foot Clan (Shredder & Baxter Stockman) | League of Assassins (Ra's al Ghul, Ubu & Talia al Ghul) | Joker | Harley Quinn | Scarecrow | Mr. Freeze | Poison Ivy | Bane | Two-Face | Penguin

Video Games
NES Platformer: Shredder | Mechaturtle
TMNT II: The Arcade Game: Shogun | Tora
TMNT 2: Battle Nexus: Utrom Shredder
TMNT 3: Mutant Nightmare: Utrom Shredder
TMNT: Mutants in Manhatten: Krang | Shredder
TMNT: Shredder's Revenge: Foot Clan (Shredder, Bebop and Rocksteady) | Krang | Groundchuck and Dirtbag | Rat King | Tempestra | Tokka and Rahzar | Wingnut | Leatherhead | Triceratons | Baxter Stockman | General Tragg | Chrome Dome | Slash