"How do we even know the blood is theirs?" Sarina asks as Donatello examines the street.

"We don't," Donnie replies. "You, however, can track where that van drove off by looking for tire tracks."

She pauses to think over his plan, then nods. She turns around, making her eyes swivel and focus as she switches between different vision lens. She catches sight of faint tracks, taking off down the road with a quick hand motion towards her husband. He follows, bō staff at the ready.

The tracks bring them to the docks near where the criminal underworld used to have dealings with the Foot Clan. The van is parked near a rather large building, cracked windows only slightly illuminated by faint lights from within.

The couple doesn't say a word to one another, only casting side glances towards their spouse before they take off towards the dimly lit space. Inside, two cages surrounded by Kraang droids greet them. Dakota sits in one, trying to reach Asher though the bars. Asher whimpers and holds his foot, which has a gunshot wound in it. Two rather small tubs of mutagen wait for use, attached to giant spray guns.

Sarina focuses, feeling the dull signal in the back of her head. That signal has always told her when the Kraang are near, yet this time, it's incredibly weak. The alien robots must be just that.

"Good news, they're weak," she reports. "Bad news for them, I'm going to personally blow them to bits," she growls.

"Weak? How so?" Donnie inquires.

"I mean that this is a small fleet, most likely sent to Earth to get a test subject or two. Stop them, stop the Kraang from making a comeback."

"Gotcha." He turns his gaze towards the mutagen "Make sure they don't get any mutagen near the kids. I'll distract them. Try to take out the guns."

She nods, leaning over and pecking his cheek. "Be careful."

He smiles once more before turning and launching himself off the platform that they situated themselves on. He lands solidly, spinning his bō staff as a small smirk flickers across his face.

"HEY KRAANG!" he shouts.

The aliens snap to attention. Dakota and Asher look up, their faces brightening with hope as Dakota scrambles to the closest edge of her cage.

"Dad!" both twins exclaim.

"It is the one known as Donatello," one droid reports.

The Kraang open fire on him without another moment of hesitation. He dodges the blasts easily, keeping one eye on the Kraang while he tries to see if Sarina is getting anywhere.

Sarina moves to the giant mutagen guns, her steps careful and silent. She reaches the computer, trying to work with the technology. She taps a few buttons, trying to override the controls but finding that she's getting nowhere. A few Kraang start to take notice of her.

"The one known as Subject 60184 must be what is known as stopped."

She grits her teeth, searching frantically for a new plan. The Kraang boot up their weapons as she looks back at Donnie. His staff is burnt and broken, so he's fighting the bots hand to hand now. It's almost as if she can feel him growing more and more exhausted with every punch.

She looks back at the control panel, taking a deep breath as her flashing eyes fall on her last resort. She places her hand over the button and presses firmly. A giant explosion rocks the warehouse as the guns self destruct, throwing the cyborg and mutant turtle to the ground along with most of the Kraang.

Sarina blinks wearily as she looks up through the haze of purple smoke, barely able to see the cages holding her two children.

Donnie groans nearby. Her attention switches to him, her eyes wide and worried. He coughs, urging her to crawl to his side as her muscles ache from the impact of her fall. His face is lined with scratches and cuts, his entire body bruised and battered. Burns line his arms from the bullets he only just managed to dodge. His eyes remain shut, his mouth slightly agape.

"Donnie?" She shakes his shoulder. "Baby, come on."

He doesn't respond, and she hugs his head gently to her chest, her eyes shut tight. His warm breath can be felt on her neck as she holds him closer against her, her heart racing as she tries to calm herself down. She can hear the confused bleeps of the Kraang as they try to recollect themselves.

"Kraang! Did the ones known as Subject 60184 and the turtle Donatello become what is known as annihilated?"

"Kraang does not know, Kraang. Kraang cannot see through the smoke that invades that which is this place."

"Should that which are mutagen experiments continue with the turtle offspring, or should we continue with the other subjects?"

Sarina's eyes start to glow as they snap open. There's still mutagen left that didn't get hit in the self destruct, yet anger is spurring her more than ever. Other subjects...she'll be damned if she lets anyone else get mutated and treated the way she once was, much less her children. She lowers Donnie to the ground gently as she stands up.

"You won't lay a hand on them," she says, her tone dangerous.

They experimented on her for years, they hurt her husband...they will never get her children. They won't live long enough to attempt such a foolish experiment.

Her palms start glowing and Donnie opens one eye slowly, his entire body aching as his vision swims and his head pounds. He can just see his white-clothed wife standing above him, stance unwavering and face set with intensity.

"S-Sarina," he croaks. "You can't...you don't have your battery..."

"I know." Her eyes glow even brighter. "I have to try."

"Kraang! The one called Subject 60184 is preparing for attack of Kraang!"

"Kraang knows! Kraang is not what is known as an idiot."

She raises her hands, and there's a loud blast as she fires blue lasers from one palm. Instantly, an entire group of the aliens is annihilated with loud cries. She leaps into the air, front-flipping and firing off ten rounds of blue rockets from her fingertips, taking out more pink-brained freaks.

She snarls, every light and circuit on her body glowing as she spins, taking out every last Kraang still standing. They all let out alienated shrieks of terror as she destroys them.

There's a sudden, deafening silence as the last robot powers down. Sarina immediately stops glowing.

"Mom!" Asher and Dakota cry.

She exhales, stumbling forwards as her lights dim a little. She sinks to her knees, a warning flashing in her vision as she takes in slow ragged breaths.

"Kids..." she whispers, unable to push herself towards them. "J-Just hold on..."

She shudders, her brain whirring desperately as she tries to stay awake. She looks up as she lowers completely to the floor, her arms struggling to support her.

Asher looks up as a tall man in a pinstriped suit enters from one of the back rooms, his sunglasses hardly specked with dust. He notes the carnage, then his shaded eyes fall on Sarina. A look of visible concern crosses his features.

"Hey! Get us out!" Dakota calls to the man.

His head swivels in their direction, the concern remaining as he takes in the children. He takes a few calculated steps towards the panel below their cages, tapping a mere three buttons before the locks pop open. Dakota leaps out, helping Asher as he limps heavily.

The suited man watches the children, unsure of how to react. The girl looks so much like Sarina and Donatello's adopted daughter, yet the turtle boy is unfamiliar to him.

"Who are you?" Asher asks. "Why did you help us instead of the other Kraang?"

"I am not a Kraang. I am an Utrom," he responds. "My name is Bishop, but right now that is not important. My daughter is hurt."

He turns and moves towards Sarina. The fraternal twins look at one another, mismatched eyes wide.

"Daughter?" Dakota asks.

"That's what he said. Let's go with him," Asher says.

They hobble after him. Bishop kneels next to Sarina, resting his fingers against her neck as his gaze flickers to Donnie. He purses his lips as he slips his arm underneath the cyborg's body and lifts her upper half carefully so that's she's sitting up. Her eyes remain half-lidded, glowing only a tiny bit as she leans against Bishop.

"Hey, what do you mean by daughter?" Dakota calls. Asher lets out a gasp as his injured foot gives him a particularly uncomfortable jolt of pain, causing his sister's attention to waver.

Bishop looks up at the children. "Help your father. I'll explain everything soon."

The younger girl opens her mouth to speak, but Asher stops her. He pulls her towards their dad, the two of them ignoring whatever pain they're feeling.

"Dad?"

Donnie groans, opening both eyes a crack. Dakota kneels over him, her one red eye glowing with worry.

"Hey sweetie," he mumbles, looking up at his daughter.

"What happened? We couldn't see most of it," Asher says, looking to the burn marks and scratches on his dad's shell and plastron.

"Kraang droids...lots of them, only two of us."

"There's a guy here. Ash and I don't know him," Dakota says.

They help him up, allowing their tired father to look at the Utrom kneeling next to Sarina. His face slackens.

"Bishop?" he asks. "What are you doing here?"

"Originally, I was freeing the prisoners and stopping the Kraang, but you beat me to it," the alien responds with a slight chuckle to his tone. Asher and Dakota narrow their eyes a little. Bishop glances to them fleetingly. "Now...the girl looks the same, but did something happen to your son, Donatello?"

"Mutagen mishap," the purple-masked turtle says, hoping that the Utrom won't hate him. "He was young. He's used to being a turtle now."

"What the shell is going on?" Dakota asks, sounding whiny and tired.

"Kids, Bishop is your other grandfather. He's the one who mutated your mom when she was a baby," Donnie explains. "He can tell you all about his home planet when we get home."

"That is a good plan," Bishop agrees, standing to his full height with Sarina in his arms. "Asher, we'll get your foot checked, while I must remind my daughter of the dangers of using her powers without sufficient charging."

"We'll talk about your punishment with the others," Donnie adds, closing one eye as he holds his head.

The two kids nod before they help up their dad the rest of the way. They both support him, limping after Bishop as the odd family starts to head home.

"Hey grandpa Bishop?" Dakota asks, tugging lightly on the hem of his suit jacket.

"Yes?" he responds.

"You aren't my mom's biological dad, right? You adopted her, like how my mom and dad adopted Asher and I?"

"Correct."

She smiles. "It must run in the family."

Bishop can't help but smile a little.