Donnie: If you see it on the show then Myra doesn't own it. If you don't see in on the show it might be a different matter. But if you look at this plot it started on the show and got expanded here so that makes it more of a gray area…

Leo: It doesn't matter Donnie. Either way this is only written for entertainment and in no way is there any monetary compensation for it.

In a lab in the building of TCRI stood four containers. Each one clearly had a large oblong lifeform in in shuffling about. Around them Kraang droids were going about the task of setting up the tubes in order to infuse the life forms inside with mutagen. And on a screen against the right wall was the image of the leader of the Kraang, knowns as Kraang Prime.

Kraang Subprime came in with two Irma droids at his side. Kraang Prime looked down at the second in command. "Did you extract the needed information for the rat mutant?" Kraang Prime asked.

Kraang Subprime held up the item with the information on it in its Irma like hand. "We copied it from that filthy rat." He answered. "Just barely though before the turtles and their little human pets showed up. It had better be worth it."

A voice from the shadows replied, "Oh, it will be worth it. I guarantee it. With the knowledge copied from Splinter into them they shall have the knowledge needed to beat the turtles."

"All five of them?" Kraang Subprime questioned.

"What?" The voice in the shadows shot back.

"There were five turtles there, a female one that seemed to have shown up from out of nowhere since they ruined the second invasion plans." Kraang Subprime reported.

"This was not anticipated." Kraang Prime stated. "We should consider aborting this mission."

"That will not be necessary." The voice said. "We can make it work even if there is an extra turtle to contend with. Besides, we already have to contend with their two human allies."

"Four." Kraang Subprime interrupted. "There was this blonde human and it appears the daughter of the Shredder has found her way on their side."

"Then we'll deal with them too." The voice replied. "Our new warriors will know things that none of them could possibly know. The small numbers advantage won't matter."

"If there is one at all." Kraang Subprime added. "We can make sure which one of us have the numbers advantage anyway."

"Then let the mutation begin." Kraang Prime ordered.

Another Kraang walked over to the master controls and activated the pumps that traverse the mutagen into the enclosed areas.

A couple of days passed. It seemed to Splinter that it was impossible to go ten minutes without one of his students or children making sure he was doing okay, though with April and Casey it was a little less frequent since they still had to go home at night. It wasn't that he didn't appreciate the attention but at the same time he didn't really need to be babysat either.

He came out of his room and was grateful to see that his four sons, Aaliyah, April, Jennifer and Casey were currently around the TV eating pizza and watching an episode of Crognard the Barbarian. Of Karai there was no sign but he suspected his daughter was in her own room, social interactions still not being her big thing.

Jennifer had been sitting on Raph's lap with her right arm around his shoulder when she noticed the movement and turned to see him. "Hello Master Splinter." She said and the others turned to see him come out. "How are you feeling?"

"I am doing well my dear." Splinter said to her. He went to the kitchen, opened the freezer door where Ice Cream Kitty handed him a cheesesicle. He patted her on the head gently and then closed the door only to see Karai there now. "You move very stealthily, my daughter."

"The one thing I can give Shredder credit for was making sure I was well trained." Karai noted. "Too bad he screwed the rest of our lives up."

Splinter nodded a little. "We cannot change the past my daughter, all we can do is live in the now." He chided her gently. He went back into the living room with Karai. "What have you done to determine what the Kraang took from my mind?"

Donnie was the first to answer. "To be honest we're not really sure what to do to find out what they did." He replied cautiously. "The Kraang pretty much destroyed the equipment that they used to do that when they were trying to stop us."

"Is there no way to salvage it or to bypass the damage?" Splinter asked.

In truth Donnie had not really thought about. Between worrying about Splinter and enjoying the fact he finally had a relationship with April it hadn't been high on his thoughts. "I'd have to take a look at their equipment and see." He answered.

"I think we should go and take a look at that then." Karai said. "If we can figure that out we might be able to predict the Kraang's next move."

Leo nodded. "You're right Karai." He said and looked to his brothers. "Let's go then and see what we can find, April, Aaliyah you should come with us too."

"I'm coming too." Karai said.

Leo shook his head. "No Karai. You, Casey, and Jennifer stay here with Master Splinter." He said.

"I do not need to be guarded Leonardo." Splinter reminded his eldest son sternly.

"Of course not." Leo agreed, perhaps a bit too hastily which kind of contradicted his own words. "But this is a simple reconnaissance mission and considering we had a couple different things fine the lair in the last couple weeks its better safe than sorry."

Jennifer nodded a little. "I'm sorry sensei, but Leo is right. If there's any chance my father finds a way back from where Renet sent him he will come looking for us and he knows where the lair is. And if Hector survived the Dark Oni might remember from when Yen brought him here." She replied.

"Perhaps." Splinter allowed though he had his doubts. "Very well, make it so."

The four turtles and April got up, with Jennifer moving over onto the couch so that her red masked boyfriend could get up as well, and headed toward the Party Wagon as Casey stretched and looked at Karai. "I guess it's down to us now sweetheart." He said.

Karai snickered. "Sweetheart?" She questioned with a shake of her head. "That has to be the lamest attempt at picking up I have ever heard." She walked over to the punching bag they had set up to throw a few rounds.

Jennifer smiled and laughed a little. "That was classic Jones." She teased. "No wonder April chose Donnie."

The vigilante gave out a good natured huff and then reached for another piece of pizza as he went back to watching TV.

In the Party Wagon the drive to the location wasn't that long. They parked just outside and headed into the area where they had done the copy or extraction or whatever. Donnie and April knelt down to take a look at it while the other four turtles kept an eye out for trouble.

"You want some help?" Mikey called out to Donnie. "When it comes to Kraang stuff I am the Dimension X genius."

"We've got it Mikey." The purple masked turtle replied with an eye roll.

Personally Raph figured that his youngest brother liked to rub in the fact that he was actually really smart somewhere, especially to Donnie who otherwise was the resident genius of the group.

Of course Aaliyah didn't know that. "Dimension X genius?" She asked.

"Dimension X's laws of physics works differently than the ones here on Earth do." Leo explained to the female turtle in the white mask as he kept one eye out for trouble. "Plus time passes differently. Months there is like a day here."

"That's interesting." Aaliyah admitted. "Not sure I'd want to visit there though."

"Hope you never have to." Raph said to her. "Everything there also wanted us dead."

"Definitely wouldn't want to live there then." Aaliyah decided as she started to look around a little. Raph swore he saw his other brother staring at her just a little bit before returning his focus to watching for trouble.

Distracted or not, Leo was the first to hear the sound of footsteps. "I hear something." He said to his team mates. "Weapons at the ready." Everyone except for Donnie and April drew their weapons as now they could hear the footsteps now.

The last thing they really expected to see where four mutant rats emerge from the tunnel.

Splinter had retired to the dojo to train. He could hear Karai punching the bag as if she were releasing some sort of pent up frustration. Perhaps she was since he knew his daughter didn't like to be left out of anything, even if it wasn't more than a reconnaissance mission. He knew Jennifer and Casey were by the TV, though rather the petite blonde was actually watching TV or not was another matter. He had noticed that on her own she preferred to read.

Then he felt an odd sensation and gasped. Moments later both girls had come into the dojo with Karai questioning, "Father?" and Jennifer with, "Master?"

"No." He said to himself. "He was right." He looked to the two teen girls. "The Rat King is back."

"We meet again, vile turtles." Rat King said as he came up from behind the four rat mutants. "And April O'Neil. I guess I was wrong when I told Donatello he didn't have a chance with you."

"Falco." April looked up at her name and saw him. "What have you done?"

"I've taken this to our next level." Rat King answered her.

"Who is this?" Aaliyah asked.

"His name was Victor Falco. He mutated Dr. Rockwell into what he is now so he could gain psychic powers but it turned him into what he is now, the Rat King." Leo explained.

"Lame name." Mikey fake coughed and got smacked by Raph.

"Surely you remember my pets." He gestured to the rats. "Caligula. Nero. Commodus. Claudius." He introduced. "My partners the Kraang were more than happy to fully mutate my rat army for me."

Commodus glared at Mikey and mocked. "Smell the cheese turtle, smell the cheese."

"Um, my bad." Mikey tried with a shrug. He only got glared at.

"So you managed to get some real mutants." Raph said to Rat King. "Good for you, but that still won't help you against us."

"Oh, we shall see about that." Rat King said with a laugh and then pointed at the turtles. "Attack."

"Remember we have to cover Donnie and April so they can delve into the Kraang machine and find out what they wanted with Master Splinter." Leo reminded his two younger brothers and Aaliyah as the mutants rats came closer.

"At least they don't have any weapons." Mikey pointed out, trying to find a bright spot in this weird new situation.

As if waiting for that comment they each drew weapons. Caligula had a sword, a large broad sword to be precise that Leo was sure no one he knew except Slash and Leatherhead could have held one handed, but this rat mutant was doing just that despite not being bigger than him. He suspected it had to do with the fact he was, as Mikey would put it, double mutated or something like that.

Nero took out a scythe like weapon much like Aaliyah's but with a flick of a button on the side it became the same size as a bo staff. It now seemed like the scythe most people associated with the tradition image of the Grim Reaper.

Claudius pulled out two objects like Raph's sais but the middle blade was jagged like a zigzag line instead of straight like the red masked turtle's weapons.

Commodus took out a weapon where one end looked like Mikey's nunchuck but on the other end was not a place to hold but instead had a spiked mace on the chain, similar to Slash's mace but was smaller.

"You and your big mouth." Raph noted with a glare at his orange masked younger brother. "It's a good thing I can't take the time to punch you."

Then the mutant rats attacked. Leo had to use both katana to block a downward slash from the broad sword and even then it took all of his strength to make that block work. Raph had to dodge a stab attempt from the psycho looking sais. Aaliyah had to get on one knee to block the scythe coming at her with her two bunrei's. Mikey's nunchuck's briefly got tangled up against the chained mace before he and his weapons were tossed to the side.

"This isn't going well Donnie." April noted. "We have to do something to help them."

"I know, but we need to find out what the Kraang were doing with Master Splinter." Donnie reminded his red headed girlfriend. "They're going to have to hold the fort a little longer."

Leo tried to sweep kick Caligula but the rat jumped up and over him, landing behind him and delivering a kick to the back of Leo's right knee, which had been injured during Shredder's attack during the second Kraang invasion. Leo flinched just a bit and fell to the ground, though he was quick enough to dodge a follow through with a fist.

Raph moved to deliver a knee to Claudius's face but he brought up his weapon to block it, leaving a nasty scratch on his knee. When the red masked turtle landed on the ground he let out a, "Damn it." From the sharp stinging. The area was cut up and blood was coming from the wound.

Mikey rose up and tried to deliver a swinging high kick at Commodus but he used the chain of his weapon by wrapping it around Mikey's shin and tossing him to the ground hard. "Take the ground, take the ground." He mocked the orange masked turtle.

Nero tried again to swing at Aaliyah and she barely dodged the incoming razor sharp scythe. She set her hands on the ground and shot a kick out at the rat mutant's gut. He saw it coming in enough time to dodge it but wasn't quick enough to avoid contact. It made him stumble back just a little.

April had kept her eye on the fight since there wasn't much she could do to help Donnie with his search right now. Then it dawned on her what had happened and she had sinking feeling she knew what the Kraang had wanted Splinter for. "Donnie, I think we better help your brother's and Aaliyah." She said to her boyfriend. "We don't need to worry about what the Kraang were doing now."

Donnie looked over to object but saw the look on her face and decided she knew something that he hadn't figured out yet. He stood up and drew his bo staff. "Okay, let's do it." He said.

April looked to him. "We're not going to stand a chance right now. We need to concentrate on getting out of here." She said to him.

"Hmm." Donnie murmured as he looked around. He noticed some cables lying around that were attached to something similar to hydraulic locks that in fact lead into the pipes in the sewer system. "Maybe we need to create our own smoke screen." He said to April. "Reverse whatever pressure there is in their makeshift system into the sewer pipes."

"Sounds good." April agreed. "I'm going to try to help…" She hesitated. She wasn't sure which turtle needed the most help for a couple of minutes. Raph was bleeding but the only turtle to really connect a hit was Aaliyah. She was also fairly sure that Mikey's shell might have gotten knocked loose though he was doing a decent job ignoring it. "Whoever." She finally settled in on.

"I'll make it quick." Donnie promised her.

April ran forward, making sure to ram an elbow into Claudius's back for any help it would give Leo before she slid over and tripped Commodus, so his weapon went flying as he landed hard.

"Thanks April." Mikey said.

"Are you okay?" She asked him.

Mikey nodded. "I think I will be, as soon as we get out of here." He replied.

"Donnie should be working on that right now." April promised the youngest turtle gently, and then the two of them had to dodge quickly as Commodus had recovered his spiked chain ball and tried to bring it down on one of their heads.

"Finish them off quickly my children." Rat King ordered. "That way we may move onto our next objective."

"Forget that Rat King." April countered back as she kicked a rock the size of a jug at him. He was barely able to dodge out of the way.

Leo noted with interest the rats were too intent on going after the turtles rather than worrying about Rat King. If it had been Master Splinter they would have lost their focus to help their father. The broad sword was swung again and he ducked under it and rolled to the side towards Raph.

Raph was trying to work on only one knee now and it wasn't easy. Luckily for him Nero tried to attack Aaliyah again and she moved just under his scythe blade in a matrix like move and then locked her arms around Nero's weapon arm before tossing him over her back and making him collide with Claudius.

"Your knee." Aaliyah started as she came to the red masked turtle.

"I'll be okay." Raph said. "I don't think it's that deep."

The two fallen rat mutants started to get up as the other two started to converge again. April took a deep breath and focused her thoughts. A psychic sweep swept through and knocked the four rat mutants back a few feet along with the Rat King.

It was perfect timing as that was when Donnie was able to rupture the pipe by reversing the pressure and the area swarmed with steam. It worked as the turtle's and April used that opportunity to return to the Party Wagon and get out of the area.

"Damn turtles." Caligula stated as he put his sword down.

"I thought we were prepared for them." Nero added.

"The female turtle was more of a nuisance than I was lead to believe by Kraang Subprime." Rat King allowed. "We'll need another way to deal with her. But the other three were easily matched and I suspect you will match against Donatello well."

Between Casey and Splinter they had just finished telling Jennifer and Karai about Rat King and what had happened in those encounters. "I had thought I had defeated him after his attempt to turn innocents into rat people." Splinter said. "It appears though that I was wrong."

"Do you think the turtle's and April are okay?" Jennifer asked worriedly.

"I think they'll be fine Jennifer." Karai said. "They are highly trained ninjas and can take whatever Rat King dishes out at them."

"Yeah, well that might be a problem." April said as they came in.

Jennifer looked up and saw Leo and Donnie supporting Raph despite his annoyed look and attempt to say he was fine. The blonde could see his knee was cut up a little and came over to help lead him to the couch so that the purple masked turtle could go to the lab and get his medical kit.

Splinter was up in an instant despite swaying just a little. "What happened?" He asked, his voice filled with concern.

"Rat King, again lame name," Mikey started. He had a bump on his head from being tossed to the ground hard by Commodus. "Had his own mutant son's with him, of the rattata variety."

"You mean he created his own mutant army just as he wanted." Karai clarified as Raph was placed down on the couch with Jennifer beside him.

"Army might be too broad of a term." April told the kunoichi. "I think the more accurate term would be group. They barely worked together so I can't really say they were a team."

"How did four rats beat down five turtles and nearly full on kunoichi?" Casey asked them confused.

"Because those rats are ninjas too." April responded.

"You're joking." Karai noted.

"No I'm not." April responded with a small glare. It wasn't that Karai really could know what happened but she had a feeling that the kunoichi was doubting her simply because it was her and not the turtles. "They knew how to fight well."

"They did." Leo assured Karai. "They were very well trained, somehow as well trained as we were."

"Except I got a couple hits on that Nero one, even though they didn't really seem to be that effective." Aaliyah pointed out as Donnie came out and went over to Mikey to make test him to make sure he didn't have a concussion of some sort.

"And I think I know why." April said to the female turtle. "You weren't trained by Splinter."

"What does that have to do with anything?" Mikey asked.

Splinter thought he understood what the red head was getting at. "The Kraang copied my knowledge of ninjitsu so that they could implant that knowledge into these mutant rats of Falco's." He surmised as he absent mindedly stroked his beard. "It is also reasonable to say that for the Kraang are working with Falco and they are the ones that mutated his rats."

"Why?" Mikey asked.

"Can someone smack him for me?" Raph requested with a weary sigh.

"I got your back." Casey said to his best friend as he reached over and slapped the orange masked turtle upside the back of the head.

"Thanks man." Raph said genuinely.

"Anytime dude." Casey replied with a smile.

"You two know that doesn't really help me out here, right?" Donnie inquired annoyed. Again Casey laughed a little but said nothing else.

Jennifer shook her head, not understanding how they could do that or how Mikey could put up with it. She thought though it might have to do with being boys and brothers, even if Casey was more or less an adopted one.

Leo ignored the exchange but answered his youngest brother's question. "The Kraang want us dead, Rat King wants us dead. It's a match made in Kraang heaven."

"This does present one opportunity." Splinter said as he looked to Jennifer. "I have helped you develop your fighting skills and I have helped you develop your psychic skills so that you could help April to free my daughter." He stood over her now and placed his hand on her shoulder softly. "Now I shall help train you again, to use your healing powers."

"Come again?" Karai asked, not sure she heard that right.

"Jennifer can heal." April answered. "Something else her father did to her with experiments. So far it's only been an instinct for her own body though she did once heal Raph after Hector hurt him horribly."

"I don't know how." Jennifer reminded them.

"First off, you must focus as you would with your psychic powers." Splinter said to the young blonde. "They are tied to your emotions, more importantly I believe tied to your positive feelings."

"Make sense since you looove Raph." Casey jokingly mocked.

"Hush." April reprimanded him softly.

"If my hunch is right, in time Jennifer will be able to heal anyone she cares about regardless of their status with her." Splinter said to them all sternly. "Imagine a wave of blue light, flowing from your body. Imagine directing that down your arm, into your hand and into Raphael's knee. Imagine his skin as it was this morning." He directed her.

Jennifer took a deep breath, placed her hand on Raph's knee and closed her eyes, imagining exactly what Master Splinter told her to do. She found she could almost picture it all and she almost swore there was a tingling in her hand. Then she heard Raph mutter, "Awesome." She opened her eyes to see that she had done it. She had healed Raph's knee.

"Great job sweetie." Raph said as he gave her a hug and kissed her on the cheek softly.

"Well done, my dear." Splinter praised as he gently squeezed her shoulder.

"Now that is something to see." Karai agreed.

"That's the first time any of us have actually seen that." April replied. "No one was there when she healed Raph, no one even knew she had until he showed up to help us with Hector. And that glowing show isn't seen when her body does that if its own accord."

"Fortuitous as this may have been, we are left with other more lethal problems." Splinter reminded them all.

How will the team stop the rat mutants? How will the team defeat the Rat King? What will the Kraang do next to see this plan work? The adventure continues.