Back in the lair, the remaining three turtle brothers, joined by Kristopher Grimm, were watching Mikey play Space Heroes Pinball. "Uh-huh. That's where I want it. That's where I want it!" The playful turtle cheered while the small metal ball bounced throughout the machine. "Mm, aw yeah! About to hit the high score. Oh, yeah, we're gonna do this." A second and third ball entered the machine as Mikey skillfully kept them all from falling into the pockets. His brothers and Kris let out encouraging cheers as they continued to watch, impressed at Mikey's talents.

"Great use of your time," Raph's voice spoke from behind the group. They turned to see him standing at the turnstiles that marked the entrance of their lair. Mikey turned back to his game just in time to see all three pinballs fall into the front pocket, signifying that the game was over. He let out a disappointed whine at not being able to achieve the high score like he had wanted. Raph jumped the turnstiles as he continued speaking to his brothers, "while somebody else is out there busting the Kraang's brains in."

Casey followed him inside, leaving a comment of his own, "And that somebody wasn't us. We got other vigilantes out there going after those alien blobs."

"Sounds good to me!" Mikey stated, remaining ever the optimist. "Less work for us."

"It's not good!" Raph barked, getting in Mikey's face as his irritation level began to rise. "The Kraang stole Plutonium. And whoever took 'em down, stole it from them."

"Interesting," Donnie mumbled, placing a thoughtful hand on his chin. "Maybe Shredder's going after the Kraang again."

Raph shook his head slowly, "I don't think these were Shredder's guys."

"You keep talking about this Shredder guy," Kris commented, putting his hands in the pockets of his flame patterned hoodie. "But I have yet to see him or his 'guys'." Raph glared at him, not liking that Kris was insinuating that he and his brothers were lying about their greatest enemy. But the turtle's visual hostility was simply returned with a joking smile from Kris.

"Ha!" Mikey suddenly cried out, closing his eyes and imagining a squirrel firing off two laser guns simultaneously. "I know exactly who's behind this." He quickly leaned back, wide eyed, as Raph got in his space again, jabbing a finger into the younger turtle's chest.

"You better not say squirrels with laser guns again," Raph growled.

"So, what do we do, Leo?" Donnie asked, turning to his brother and leader. "Hunt down whoever's hunting the Kraang?" He made a fist to further aid his suggestion.

Leo thought for a short moment before making his decision, "I think we better blanket the area, keep an eye out." His brothers and Kris all turned to face him as he assigned each of them a location. "Raph and Casey, stick to the alley ways. Donnie and Mikey, you take the rooftops. Kris and I will cover the sewers."

"Hey," Mikey whined, his shoulders sinking low. "Why do you get to hang with the super powered mutant, Leo?" Kris gave the orange banded turtle a smirk as he moved past him to stand beside the ninja leader.

"Because … Just because, Mikey," Leo replied. "We'll meet back at the lair at midnight." The six teens left the lair and immediately went separate ways, heading towards their designated areas.

...

Raph and Casey ran across the shallow overhang of one of New York's buildings. When they reached its end, they leapt down to solid ground. Raph rolled into the alley, staying close to the wall as Casey came to join him. "You think you can keep up this time Jones?" Raph asked curtly as they began casually walking down the alley.

"What is your problem, Raph?" Casey retorted angrily while spreading his arms out by his sides.

"The whole fire escape thing?" They stopped walking as Raph turned to his friend.

"Face it, Casey," he began, pointing a finger at his friend. "Street thugs and robo ninjas are one thing, but alien threats from other dimensions are a whole different ball game."

"I took on a giant space worm singlehandedly," Casey reminded him, sticking a thumb towards his own chest while getting in Raph's face.

"Yeah," Raph scoffed, rolling his eyes. "You were singlehandedly eaten by it." Raph turned on his heel and continued walking down the alley.

Casey let out a frustrated groan, before pointing angrily at his retreating friend and calling after him, "Have you ever fought living intestines? I don't think so!"

Raph stopped walking again to turn his head in Casey's direction, "Bottom line: you're in over your head on this one, Casey. Trust me."

"I might not have ninja training," Casey said, waving his hands in a mock gesture. "But I've achieved a level of awesome attainable only by Casey Jones." He drew out his hockey stick and spun it around a couple times before standing it against the ground and leaning on it. He pulled down his mask before adding, "It's mystical." Raph raised his brows, not saying a word, and then turned to start walking again. Casey followed after returning his hockey stick to its place. They walked in silence for several minutes, before Casey spoke up again, "Hey, Raph. There's something I've been meaning t'ask ya."

"What?" came Raph's dull reply. A cheeky smile spread across Casey's mouth, knowing that the question he was about to ask would get his friend flustered. That was half the reason why he was asking it. The other half was simple curiosity.

"Do you have a crush on Kitkat?" Casey asked, his smug grin getting wider. He was referring to Kaitlyn Grimm, Kris's twin sister. Kitkat being her nick name. Raph's body got tense as he froze. His eyes bulged in surprise and his cheeks began to blush. The reaction only lasted a few seconds before Raph forced himself to frown. The blush, however, refused to go away. He snapped his head towards Casey, gritting his teeth and clenching his fists.

"That's stupid!" he barked. "Why would I have a crush on her?"

"Wow," a voice above them laughed. They looked up to see Kris floating above them, using his flight powers. He was positioned as though he was lying on a couch that had been fastened to the ceiling. His hands were tucked inside his hoodie, like they were most of the time, and gravity caused his hood to rest against the back of his head. The smile he was giving Raph was both knowing and mischievous. "That is a very typical, defensive response. Only makes me believe more that you have a crush on my sister." His legs swung down to the ground as he landed next to the other teens.

"Except I don't," Raph growled.

"Oh, yes. Very convincing," Casey said, resting his elbow on Kris's shoulder and nodding slightly with a sarcastic smile.

"You know what? I don't have to prove anything to you!" Raph bellowed, getting angrier. "What are you even doing here, Krispie? You're supposed to be with Leo." Raph said, using Kris's nick name.

"And he's changing the subject," Kris mumbled to Casey, causing him to laugh, before they turned back to Raph. "Your brother's more boring than those sewer tunnels. Figured you guys would be more fun. And I was right. Lover boy." Kris teased the turtle and held up his fist to Casey, requesting a fist bump. The human teen obliged and pounded his fist into Kris's while they both laughed. Raph let out an exasperated growl as he spun away from them, raising his head and hands to the sky in defeat. He marched off in the direction they had been walking before, followed by the still howling Kris and Casey.

...

Mikey and Donnie ran and flipped across the rooftops, their heads shifting around as they scanned the area. Then Mikey gasped while sliding to a halt, noticing something on the lower building's roof below. "Whoa, dude. Check it out, Don." Don was by his brother's side in an instant and seeing what Mikey had called him over to see. Like what Raph and Casey had seen before, several damaged Kraang-droids, absent of Kraang, laid strewn among the rooftop. Mike and Don leapt down, crouching to absorb the small amount of shock from the fall. Don walked through the debris and up to a severed, robotic limb, reaching into his bag to pull out a pair of high tech, examination goggles. He knelt down and lifted the arm, turning it around in front of his goggles.

"You see this carbon scorching?" Don asked, not actually expecting Mikey to answer. "They were taken out by plasma weapons of some sort; tech that's just as advanced as the Kraang's." Don stood to full height and raised his goggles onto his forehead before continuing, "We got to warn the others." Just then Mikey held up a severed Kraang-droid head in front of Don's face.

"The Kraang is getting their Kraangs handed to them by those who are not Kraang," the youngest turtle mimicked playfully. He smiled brightly at Don, who only returned it with a displeased expression. The robot head short circuited slightly, causing the eyes to light up again for a few seconds. This startled Mikey, who reflexively threw the head into the air, and then covered his own head protectively with his arms. The Kraang-droid head fell back to the roof top as Don pressed the droid limb he was still holding into his face, face palming at his brothers childish actions.

...

Leo walked through the sewer tunnels, hearing electronics sizzling in the distance. He knew that meant he was getting close to what he was looking for. He pulled out a pocket flashlight and continued towards the sound. When he turned the corner, he saw a masacre of machine parts. He followed the seemingly endless trail of destruction, looking for any signs of clues to who was behind it.

"Ah, wow," he breathed. "Whoever did this not only destroyed them, they obliterated them." He moved his flashlight over the area, searching slowly. He saw a piece of debris that didn't fit with the chrome droids and moved to pick it up. He brought it close to his face for examination, continuing to shine the light on it for better vision. After a short moment, his eyes grew in realization at what it was, and who it belonged to: Slash.