i've always thought that donnie was super duper smart so... yeah... just letting you know. and leo... such a douche!

Carrying the half conscious kid back to the sewers was harder than expected. He was dripping blood, leaving a trail behind them that Mikey volunteered to cover up, which took even more time. Leo was torn between giving up on the kid or convincing the two to dump him off at the nearest hospital, which was closer than the sewers by far. Jumping and doing any type of parkour movement was almost impossible, since it jostled the dead and very bloody weight that Donnie insisted on carrying. Mikey had wanted to but when Leo told him about the chains and if the kid really was Raph, he would be more than Mikey could handle.

Leo vaulted across a rooftop and landed on one below. Mikey met him as Donnie stopped at the ledge. Leo watched him as he calculated the jump and looked like he didn't want to do it.

"Donnie, we don't have all day!" he hissed in the night.

"That far of a jump will probably kill him!" Donnie yelled back. "I can't jump from here."

"Then climb down!"

"There's a 20ft gap between buildings!"

Leo fumed. "If you had just taken him to the hospital like I said-"

"We can't, like I said. He's Raph."

"He's not Raph! Stop that!" he growled. "The hospital is a block away and we can climb up the side and deposit him in a wheelchair in the hallway or something. Someone will find him."

"You're heartless!"

"I'm not heartless! I'm practical. We can stand here and argue all night on a rooftop or you can do the jump or you can climb down. I'm not going to stand here all day for you to figure it out."

"Leo, look." Mikey said, pointing to a corner of the building they were on.

Mikey looked and saw long piece of cloth from where it had covered something and he looked at Mikey.

"What are you thinking?"

"Well, if you tie one end of the cloth over here and I go back over and tie it over there, then we can slide Raph down the cloth, where you can catch him, and then Donnie and I can jump over no problem."

Leo looked at the cloth and then up at Donnie and sighed.

"Whatever gets us home…"

Mikey fist pumped the air and grabbed the cloth. Leo tied one end of it to a jutting air vent and Mikey grabbed the other end, jumping back onto the other building and climbing up to Donnie. Luckily the cloth was long enough and he opened it up slightly to make a chute out of it. Donnie gently put the boy in the chute and they carefully shimmied his unconscious body towards Leo.

As the boy got closer, the cloth dipped dangerously in the middle and Leo dipped his side down a little so that he could compensate when his end untied itself (due to bulkiness) and the boy tumbled out of the cloth. Donnie screamed and Leo jumped after the boy, swooping in and catching him as he slammed into the original building, holding onto a window ledge with one hand. The boy let out a gag and Leo felt blood run into his shell and down his arm. Dammit… he thought as he tried to propel himself from the ledge.

Donnie and Mikey scaled the building and Donnie held out his hand to his brother.

"Hand him to me. We'll just walk."

"He's damaged to shit now. There's nothing more we can do to beat him up. I'll carry him just help me off this ledge and onto the building."

Donnie nodded and he and Mikey helped Leo get to the other ledge. Leo glared at his brothers and then looked at the boy in his arms, shaking and blood oozing from his mouth.

"If he dies, I'm blaming the both of you, do you understand?"

The two nodded and they went on towards home.

The three entered the lair and Donnie immediately ran to his room to set up some equipment he had 'conveniently' taken from the hospital supply closet. He set up an IV stand and was in complete caretaker mode. Mikey went to go get Master Splinter while Leo went to Raph's room and set the boy on his bed. The sheets immediately stained red and Leo stepped back, watching the boy for a minute. Donnie came in and quickly began to attach things to the boy and then stuffed as much gauze as he could into the wound.

"If he needs that much gauze then he's going to have to be operated on. Who's going to do that?"

Donnie wasn't paying attention as he set the drip for the IV and made sure it was in place on the boy's bloody hand. He left and brought back an oxygen tank (again, conveniently taken from the hospital) and set up a breathing tube.

"How do you even know how to do this?"

"Free time. Unlike you, who stays in the dojo to practice 24/7, or Mikey, who keeps looking up cat videos, I go to the hospitals and watch how they work. Someone had to have some medical knowledge around here and since I have equipment and stuff from the hospital-"

"That you stole."

"That I conveniently took, I studied up on how they worked and how to use them."

"But we're turtles so looking at regular hospitals isn't the same."

"Yes it is." He said, pausing for a moment to stick a trach tube down the boy's throat, flashlight on his goggles pointed straight in the boy's face. "Because of our height, weight and overall physical development, we are more like humans than turtles. True, the same medicines can't be used, but the process is much the same. Hand me that tube over there."

Leo handed him the tube and he connected it to the trach tube in the boy's mouth. He sighed and moved away from the bed for a second, turning off his flashlight and wiping his brow.

"Now… the hard part…"

"Why didn't you just take him to the hospital?!" Leo growled. "You're not a surgeon! You can't do anything to help him!"

"Yes, I can. I'm better than a surgeon. You may not have faith in what I do or care about what I do, but I do a lot for us. I invent things that you don't even know about for our protection, but what do you care? It doesn't go with what you want so it doesn't matter. Well because I put those trackers in us, I can save Raph. So get out."

"What do you mean?"

Donnie didn't answer, just shoved his brother out of the room and left Leo standing in the hallway.

Mikey came with Master Splinter in tow and Leo looked up. He pointed to the door.

"Master Splinter, please tell Donnie that he can't fix him. I told him to take the kid to the hospital but he wouldn't listen and-"

"Donatello knows what he's doing."

Leo gawked at his master. "Dad! Donnie knows nothing-"

"You underestimate your brother very much, Leonardo. He has made many things to improve your lives but you have refused them. The DNA trackers are very inventive and come in handy for more than just tracking."

"What do you mean?"

"They are made of nanobots that line the inside of the body but, Donatello can control each of them as if they were their own computer. The nanobots can also do many things individually and he can help Raphael with his wounds by repairing them from the inside."

Leo was still amazed at his master.

"You… you believe he's Raph too?"

"The evidence suggests a high percentage of the boy being Raphael. I haven't been able to see him yet but once Donatello is finished, I will look him over myself."

Leo breathed in and turned from the door.

"I'll be in the dojo."

Mikey and Splinter watched him go and Mikey looked at his father.

"Why is he being so cranky?"

"Sometimes those who think practically cannot understand that improbability can happen. It makes very little sense to them and so they try to disregard it altogether."

Mikey nodded and they waited for Donnie to finish.

After hours of painstakingly controlling at least 4000 individual nanobots to clamp vessels that were bleeding, cauterize others, removing infection from the main wound, removing fluid and blood from the lungs, moving the rib back into place, 'soldering' the rib back together (since it was broken), and many other things. The boy's vitals were on point and back to normal and he was no longer bleeding. Donnie pulled off his glasses and rubbed his tired eyes but was happy with the results. The recovery time would take a couple of weeks but the boy was good as new.

Now came the moment of truth for him. He put his glasses back on and took a cotton swab, dabbing it in some liquid and then grabbing Raphael's bandana. He swabbed the inside of it and then grabbed another cotton swab and rubbed it in the blood that was pretty much everywhere. He put it in a machine and waited. He watched as the DNA sequences pulled up and put itself together when another window flashed up on the screen and Donnie sighed.

"Perfect match…" he said with a smile.

yay! it's raph! but what will come from this revelation? will leo be able to accept scientific fact?

btw, nanobots are wonderful because they really are mini mini mini computers than can be programmed to do more than one thing. i see them with little arms and legs and shit... imagine how you will...