Kara was driving behind the guys on her scooter trying to catch up to them on their go-karts or, in Donnie's words, 'patrol buggies', "Slow down!" She yells as they keep making quick, sharp turns as if they didn't know where they were going. "Left, right! Left, right!" She heard Donnie scream as a truck sped their way, she letting out a shout in surprise and driving onto the sidewalk while the patrol buggies separate in time to dodge the truck and avoid hitting pedestrians. She looks back hearing someone shout, "Hey, I'm walkin' here!"
"Sorry!" She yells back before getting back on the road just as the patrol buggies assemble back together and drove beside Donnie and Leo hearing Mikey shout, "Woohoo! This is more fun than a Shriner's Parade!"

"What're you saying?" Raph asked just as Donnie yelled, "Right!" She put on the brake before they could ram into her with their sudden turn and follows them around the corner only to see it was a dead end and stops watching the turtles skid and swerve to a halt before they could hit the wall; Donnie's T-phone flying out of his hands and hitting the wall, the screen breaking on contact. She puts the kickstand out and tosses her helmet onto the scooter before going over to them to see if they're ok, "Are you guys alright?"

"We lost them..ugh.." Donnie says disappointedly while burying his head into his arms.

"Yeah, we're fine Kara." Leo says.

She sighs in relief before smacking him and Donnie. "Hey!" They shouted at her but backed up when she was glaring at them with her arms crossed. "You almost hit me! You're lucky I was wearing my helmet and I stopped!" She yelled, fuming at them.

"Woah. I can see steam floating from her head." Mikey whispered to Raph who nodded in agreement while smiling. "Kinda entertaining don'tcha think?" He asked while watching Leo and Donnie apologize to her like a kid would to a parent.

"That's it, we're going to see Leatherhead." Leo said before walking towards the patrol buggies.

Kara smiled excitedly kicking her feet on the dumpster, sitting beside Mikey, before jumping down.

"Uh..L-Leatherhead?" Donnie stuttered while standing up.

"He's the one who took the powercell from the Kraang. He's the one who might know where to find it." Leo climbed into the carts, putting his helmet on.

"He's also the one who likes to grab my face and shake me like a ragdoll!" Donnie said while grabbing his face and moving his hands in a shaking motion while slumping his shoulders.

"Haaha. Good times." Mikey smiled, kicking his feet on the dumpster.

"Zip it!" Donnie said while giving him a frustrated look.

"Oh, come onnn. He's a pussycat.." Mikey said, jumping off the dumpster, smiling before mimicking Donnie's movements. "Who likes to grab your face and shake you like a ragdoll!" Mikey laughed making Donnie's eyes turn white his mouth turned down to a frown.

She could see dark clouds forming around him but placed her hand on his shoulder. "Listen, he could of learned to control his anger by now. It's been a while since we've seen him. Let's just pay him a visit and if worse comes to worse I'll protect you." She smiled at the brothers who nodded their heads before going towards the buggies. "Besides." She whispers, "Who wouldn't want to grab at such a handsome face." She said standing on her tippy toes and rubbing her nose against his while giggling before going over to her scooter leaving Donnie to watch her with a dreamy smile on his face before following his brothers.

Kara had stopped by her place to get her swimsuit when they told her where his hideout was.

"Hey, where are you going?" Leo asked as she went to drive off. "Aren't you going to follow us?"

"I'll meet you guys at the lair, I'm going to get my swimsuit."

"We don't have time for this" Leo sighed, annoyed, which made her stop and give him a stern look.

"Just because you guys don't have to wear clothes doesn't mean I want to get mine wet. I won't be gone for long, I promise." She said before driving off.

She arrived back at the lair with her swimsuit in a bag and changed in their bathroom while they waited in the living room.

"See, this is the problem with girls, they always take forever." Raph grumbled just as she stepped out.

"Now what's that suppose to mean?" She asked with her hands on her hips wearing a two-piece black bikini with an embedded diamond star above her left breast and waist. She had her cap off and wearing swimming goggles that she pulled over her head keeping her bangs from covering her eyes.

The guy's eyes popped out of their sockets and she saw blood spurt out from their noses, except for Mikey's, making her jump back in surprise. "What the...uh are you guys ok..?"

They nodded while trying to hide their embarrassment.

"Haha, duudes! You should totally see yourselves! Welp! Let's go!" Mikey shouted excited to see Leatherhead with Kara right behind him. "Woo!" Leaving the boys to tend to their nosebleeds.

"Wow.." Donnie said, following after her with his eyes causing more blood to spurt and making him yell in surprise.

When they finally resurfaced on the other side Kara gasped in air, her goggles foggy from breathing through her nose but luckily Donnie let her hold onto his shell for guidance. Leo helped Kara out and smiled as she pulled the goggles off, having a visible print around her eyes where the goggles were before she rubbed them away.

"Who can hold their breath? We can." Mikey said, pointing at himself proudly.

"We wouldn't have had to if you didn't swim off to pick up trash."

"Yeah, luckily I had on these goggles, or I don't think I would of made it." Kara said, panting some while squeezing all the excess water off to dry herself.

"One man's trash is another man's treasure." Mikey smiled holding a half-decayed corpse of a rat petting it affectionately making Kara cringe in disgust. "Yeah, I'm pretty sure that's every man's trash."

She blinked hearing snoring and looked over seeing Leatherhead sleeping. "Aww." She smiled and walked over to him but was stopped by Leo. "Hold on. We don't want to alarm him so no one make any sudden moves."

"Aww, look how cute." Mikey said with hearts in his eyes but jumped back as Leatherhead roars, opening his mouth and snapping it shut.

"W-Who's going to wake him up?" Donnie asked looking to his brothers but before they could vote for Mikey Kara was beside him, gently stroking his head. "Psst, Leatherhead. It's me, Kara. It's time to wake up." She whispers, smiling down at him. His eyes snapped open, she able to see the glaze over his eyes as he stood above her, roaring in her face.

"Can we make sudden moves, now?!" Donnie yells taking a step towards Kara to get her but hears Leatherhead yell, "Kraang" and run at him, grabbing his face and shaking him like a ragdoll. "Ahh! He's grabbing me by the face again!" He yells muffled by Leatherhead's hand.

"Leatherhead, don't!" Mikey shouted as Leatherhead attacks his brother's. "He must be having a nightmare."

"That makes two of us!" Donnie shouts as he gets thrown around in the air. Kara runs up to Leatherhead, putting her arms around him as he throws Donnie at the wall. "Leatherhead, stop! It's your friends! We're not going to hurt you!" He rips her from his waist and looks into her eyes, growling at her. "It's me.." She said reaching over and gently touching his muzzle. He blinks his eyes as they return to normal, holding his head. "Kara?" He questions while looking around seeing the turtles getting up and walking over to him. "My friends. Oh no..I got angry again, didn't I?" He said letting her down and holding his hands together in shame.

"Yes! You did it again!" Donnie yells, freaked out. "Why do you keep grabbing my face?! What is wrong with my face?!"

"Would you like the list alphabetically or in a descending order of grossness?" Raph asks while twisting the end of his mask to get out the water.

"I am sorry. You are my friends, the only ones I can truly trust. That is why I gave you the powercell for safe keeping."

Kara looked down in shame as the guys looked away nervously while Donnie stepped behind Leo. "Heh, about that.." Leo started.

"Funny story-true story." Mikey began with a nervous smile.

Kara sighed and placed her hand on Leatherhead's as he looked at the turtles confused.

"But, before we tell it why don't you sit down and I, and my face, will take one biig step backwards." Donnie says while doing so, staying as far away from Leatherhead as he possibly could.

"Okay, go ahe-"

"-We lost it...we were ambushed by the Kraang and they took it back before we had a chance to stop them.." She looks away not noticing his eyes glazing over again but blinks seeing Leo dive into the water just as Leatherhead roars and runs at Donnie, grabbing his face once more and slamming him to the ground, Donnie whimpering at his predicament.

Leatherhead's eyes returned to normal as he lifted Donnie back up. "No, Leatherhead. These are your friends.." He says to himself, Donnie voicing his agreement with a "Mhmm"

"I am sorry, Leatherhead..." She said with sadness in her voice.

He sighed, setting Donnie down to his feet but doesn't let go beginning to pull on his cheeks as if they were made of clay. "Obviously you did everything you could to protect it." Mikey lifted his finger to say something but was smacked by Raph and Kara.

"Yes, that's exactly what happened." Raph said, placing his hand over his mouth to keep him quiet.

"Leatherhead. We need to get it back." Leo said.

"With the powercell the Kraang can open the portal to dimension X and when it opens-"

"-They could use it to bring anything from their home here." Donnie joins in, Leatherhead nodding his head. "Things so horrible they terrify, even me.."

"We need to keep that portal from opening. Can you tell us where it is?"

Leatherhead closed his eyes, sighing. "All I remember..is this." He said drawing a pattern in the tile with his claw while Donnie took a picture.

"I know I've seen this symbol. It's so familiar." Donnie said staring at his Kraang tech in thought back at the lair.

"The Olympics!" Mikey shouted.

"No." Donnie said continuing to stare.

"I got it! The Olympics!"

"Stop guessing. Obviously, it's a Kraang symbol."

"But from where?" Leo asked placing his hand on Donnie's shoulder.

"The Olympics!"

"Quit it!" Donnie shouted making his brother's jump back. "There's something here and I can figure it out if you'll all just go away and let me think!" He said holding his head while staring intensely at the symbol.

Kara was sitting on the table, back in her regular clothes, staring in thought at the symbol as well. She didn't say a word to him trying to help him figure it out while rolling the canister with the symbol in her hand. "He's right. It does look familiar..must of seen it somewhere before...but where?"

"Oh, the Olympics?" She heard and looked up seeing Master Splinter.

"For the hundreth-ah, ugh! It's driving me crazy! I know I've seen it somewhere else but I can't remember." Donnie said gently smacking his forehead.

She sighed seeing his stress level rising.

Master Splinter touched his shoulder making Donnie look at him. "You must calm your mind and wait. You are ninja, Donatello. The word 'nin' means patience and perseverance. Deep breath." Master Splinter said, closing his eyes and taking in a deep breath. "Breathe."

"Ok, ok." Donnie said before doing what he said. Kara looked up at Master Splinter and smiled for he seemed to have an answer for everything. "I'm calming-I GOT IT!" Donnie shouted, surprising Kara as he ran out of the room before looking at Master Splinter and grinned, giving him a fist bump. "Nice."

She followed after the guys but was having trouble keeping up so Raph let her get on his back before catching up with his brothers.

"Donnie, hold on." Leo shouted noticing Raph and Kara had fallen behind.

"Just hurry up!"

They finally stopped on top of an apartment building Donnie looking down at his phone. "I've figured out where else I've seen this." He said holding up his phone and up ahead was a large building, overtowering all others with the symbol on the front.

"TCRI?! They're behind the Kraang plot?"

"The Invasion?" Leo joined in.

"The Olympics?!" Mikey said doing a jog in place making Raph smack him across the head. "What was that?" Mikey asked, rubbing his head. "A new Olympic event." Raph said making Mikey's face fall in a pout.

Kara stared at the building and blinked in realization. "Aha. I could see that building on the rooftop of my home. No wonder it seemed familiar. Guess that's where they went after rescuing April from that robot lady."

"They've been in plain sight the whole time and we never realized it!" Donnie said staring at the building.

"I think it's pretty obvious what we have to do; We're going in and taking down that portal." Leo said as they looked back at the building before heading back to the lair for a gameplan.

"I managed to download the blueprints to TCRI." April started, showing Leo and Kara the blueprints with Raph on the side looking bored and Master Splinter behind her, listening. "Now, the bottom two thirds are just a normal office building and from what I can tell normal humans work there."

"Imagine if they knew who they were working for." Leo said with a grin "The ones who are working in this place must punch in the card known as the timecard in the clock which is known as the clock of time." He said in a robotic voice making Kara chuckle while the others just stare at him. He chuckles nervously before sitting back down, focusing on the blueprints. "Sorry, where were we?"

"Hm, what about the upper floors?" Master Splinter asked looking down at April. "Well, that's just the thing. The top third it's all blank."

"Well, whatever they built up there they didn't want anyone to know about it." Leo said hiding his pocketknife back in his bandages.

Kara freaked out a bit thinking he was going to cut himself but let out a small sigh seeing he was just hiding it. "Which means that is exactly where you have to go." Master Splinter said.

"First, we'll have to figure out how to get past security in the lobby." "Tricky..it's not like we can package you up in a box and send it special delivery." Kara blinked her eyes at April's idea and smiled before looking up at Leo and grinned. "Guess we have the same idea."

April walked in wearing a one size too big jacket with the hood hiding her face and pushing an oversized box with Kara sitting on top of it looking through papers on a clipboard and chewing gum, blowing a bubble with her cap hiding her eyes and wearing a hooded sweater, baggy pants and boots. "Eh, we got a special delivery here." She said a loud while April pushed.

"You know, you could help me." April whispered up at her as she threw her yo-yo at the elevator buttons to make it open.

"I am. I'm making the distraction work." She grinned playfully, sticking her tongue out at her as April pushed the package into the elevator, the doors closing behind Kara but not before seeing the robot lady grab April. "I know you'll be ok.." She said with confidence while waiting, sitting nonchalantly on the box.

When the doors opened, she grinned as they aimed their weapons at her. "Oh, it's not me you should be worried about." She said out loud and kicked the box once before doing a flip over them just as Leatherhead rips through the box, roaring and going all out on them. She whoops and hollers for Leatherhead before putting her gloves on to join him.

After all the Kraang were defeated on the first floor she calmed Leatherhead down, bringing him back to his senses and took the elevator to catch up with the guys standing under him with his arm on one side keeping her close to him protectively. "You are the first human to be nice to me and not run away in fear. Thank you." She smiled and hugged his arm. "Aww, Leatherhead, you're such a softie." He looked down at her and smiled before pulling her into a hug and patting her head. "You and Michelangelo are my best friends."

When Leatherhead and Kara walked through the door Kara was on his shoulder and looked at the large rock monster and grinned. "Who ordered a beatdown with a large side of kickbutt?" She said, punching her fist into her palm before jumping down from his shoulder as he roared, "Kraang!" throwing a dismembered Kraang droid at the rock monster and charged, fighting it off. Kara ran over to the guys as Donnie shouted, "Leatherhead! Get him by the portal!" He roared and threw the rock monster in the middle of it and Donnie pushed a button on his T-phone making the bomb he created explode.

"We did it!"

"Yeah!"

"Growl"

"Alright!"

"High three!"

"Looks like Rocky over there is nothing but pebbles now!" Kara said, laughing at her pun but blinked seeing a sort of shield around the portal and it looking like it hadn't taken any damage.

"What the.."

'It's still standing?"

"High three canceled."

"What're we suppose to do now?" Donnie said out of ideas.

"I could punch it a few times but I don't think that's gonna do it. "Raph said, looking down also out of ideas too.

"Uh..guys" Mikey said pointing over at Rocky, that's right we're naming him Rocky, reassembled itself.

"Well, this day can't get any worse." Raph said watching but furrowed his brow in annoyance as Rocky puts its head back on and was very angry. "And it just did."

"Something else might come through." Donnie said as the portal started glowing; a circular orb starting to form. "What do we do now?" He blinked as Leatherhead walked over to Rocky, jumping on him and pinning him to the ground while the portal was still on.

"Leatherhead! Something else is coming through!"

"Not if I can help it." He grabbed Rocky and started walking towards the portal. Kara's eyes widen while taking a step forward. "Farewell, my friends." He said just as he walked through it.

"No!" Kara shouted running towards the portal only to have Raph hold her back.

"Leatherhead!" Kara and Mikey shouted together just as the portal closed and a shockwave came, throwing them back. She slowly stands up looking at the spot where he was.

"Leatherhead...I can't believe he's gone.." Kara looked over at Mikey and hugged him tightly.

"We've gotta get out of here." Leo said, back on his feet.

"We can't just leave. With that portal operational the Kraang are more dangerous than ever! We have to destroy it!"

There was a ding sound coming from the other side of the room as more Kraang droid appeared. They started firing at them and Mikey helped Kara to the top where Rocky had made a huge hole.

"Maybe later." Leo said while taking out a grappling hook and aiming. "We'll be back." He said before shooting it, the end stabbing into the edge of the building across from them. Kara held onto Mikey as they slid down the line and escaped back to the lair.

The guys returned to the lair, looking down, devastated at their loss. Kara was with them but stayed outside the lair not wanting them to see her cry.

"Oh, you're ok!" April said with a big smile before going over to them.

Master Splinter sat up from the couch, "Welcome home, my sons. Was your mission successful?"

"'Fraid not, Sensei. Leatherhead is..gone." Leo said.

Kara could hear the conversation and when Leo spoke those words she buried her head in her knees and cried. Mikey walked up behind her and sat down next to her, hugging her, she wrapping her arms around him and cried into his shoulder. When she was done Mikey lead her inside and sat down next to Leo while April and Donnie hugged Kara.

"He saved us..and I found this!" Mikey said with a smile, holding up a piece of tech.

"Oh, good. Now you're picking up alien trash." Donnie moved over to Mikey and took it from his hands curiously.

"Do you realize what this is?" Donnie asked looking down at Mikey, who looked back up at him with a smile. "Shiny."

"It's a Kraang data storage device! If I can decode it maybe it can helps us find a way to stop them!"

Kara was with Donnie, not to help him or anything since she wasn't a genius like him, but just to be with him. She was still bummed about Leatherhead but it was hard to truly be sad around him or his brothers, specially when he made sure she was ok before starting on his work. She rolled behind him on his spinning chair waiting patiently for him to finish. When he stood up she stopped and watched him leave before rolling over towards the door over hearing their conversation.

"I don't think they were." She heard Donnie say before leading them into his lab and at his computer area.

"I used the Kraang processor inside Metalhead to access that storage device. A lot of the files are damaged but I think I found what they were after." He said typing on his computer before pushing enter and soon pictures of April filled his computer screen.

April gasped seeing the pictures. "What? They're after...me?" She said as everyone turned to her in surprise. Kara's eyes widened as she looked over at her best friend. "No way..."