No idea how this is gonna go, but whatever.

In this, None of them are shows. Spoilers for Season2 Sherlock, season 11 SPN.

(Tenth doctor, BTW. No companion)
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Dean-

I was sitting in the bunker with Sammy and Cas when a noise echoed through the library.

VrrrrrRRRrrrr
VrrrrrrRRRRrrr
VrrrRRRrrrr

"What the hell?"

"Do you guys hear that too?"

"Yes. It's familiar."

"I've never heard it before. Where've you, Cas?" I gave him a sideways glance and pulled out my gun, standing up.

"Somewhere. Ages ago, in London."

Sam gulped.

"Guys?"

We turned around. A blue box was materializing in the main room.

"What the hell?" Sam breathed

"Is that... Doctor?"

"Who?"

"The Doctor! That's the Tardis!!"

"The who with the what now?"

"Time And Relative Dimensions In Space. What's the Doctor doing here?"

"Doctor who?!" Sam practically shouted.

"Just The Doctor! Pleasure to meet you boys, Castiel! good to see you again. New vessel? He's cuter. Now, come on, get in!"

"Wait, guys. Don't shoot him. He's got two hearts anyway. Come on."

"He's got two hearts?" I asked

"How the hell are we supposed to fit in there?"

"It's bigger on the inside. Sherlock needs out help! Let's go!!

"Sherlock? Sherlock Holmes?"

"yes!! We'll only be gone a day or two! Get in the freaking Box!"

I glanced at Cas. He seemed to know this man.

"Dean. It's okay. He's an... He's an alien."

"How is that supposed to help his case?!"

"Just get in the Tardis! She's almost ready to leave!"

"OKAY BUT WHERE THE HELL ARE WE GOING?"

"LONDON!!! NOT THAT FAR BACK!!! WHEN SHERLOCK JUMPS!!!"

"OKAY LETS ALL STOP SHOUTING NOW AND GET IN THE FREAKING BLUE BOX THAT APPEARED IN OUR LIVING ROOM TWO MINUETS AGO BECAUSE WHY NOT IT MIGHT GET US KILLED. AGAIN." Sam shouted

"OKAY"

"OKAY"

"GOOD. COME ON HE'S FALLING!!"

We all clambered into the police box.

"Wow. That is bigger on the inside."

"Yes. Now, eyes, hold that lever. Hair, help me. Cas... She's falling apart. I need.... I need your grace."

"What?" I cut in. "No! That could kill him!!"

"Dean-"

"Cas, absolutely not!!"

"DEAN. Doctor, how important is this man to history?"

"Very. And if he hits the ground.... You don't want to see it. Look, Dean, I don't need much."

"Cas you can't-"

"Okay then. How do I do this."

"Dean isn't gonna like it.."

Cas gulped. Then he dropped the angel blade out of his sleeve, and handed it to the doctor.

"No. No no no. Cas, he can't heal you! We don't have anything that can heal you!!"

Sam opened his mouth to protest as well, but that 'Doctor' or whatever cut him off by snapping his fingers and turning on some kind of glowing, flying light.

"Fireflies? Bugs?"

"They aren't fireflies! They heal! I kept a few from Jack's ship."

"Oh!!" Sam started " Bugs that can heal anything, wielded by an alien in a TIME TRAVELING POLICE BOX!!"

"It can't heal anything... But most things. So yeah."

"Okay. But they have to heal me up fast. Okay.."

"Hair, hold your brother back. I have two hearts, but I can be strangled."

Sam grabbed my arms. Curses flew out of my mouth as I tried to break his hold. There were so many yellow bugs I couldn't see Cas. The second the bugs disappeared Sam loosened his grip. Everything seemed to move really slowly, except for the blue line of grace. I managed to catch Cas before he hit the floor of the box.

"Cas?" I shook him "Cas?!"

"Okay everyone! Hold on! Hair- Sam- whatever, turn that. Dean- help!"

I barely heard the man. Cas wasn't answering me.

"Dean!" Sam's voice got my attention. "Pull that!"

Still holding on to Cas's limp body, I reached up and pulled down on the lever.

The noise we had heard in the bunker started up again. I grabbed a bar above my head and held on as the floor started tipping. The doctor flung open the door and pulled someone in, then threw some sort of dummy out.

"Pull it again!!"

Sam pulled the lever this time, sending the box flying again.

"Who the hell are you?" Another British voice cut through the noise.

"I'm the doctor. I just saved your life."

"You didn't do shit! Damnit Cas. Come on buddy..."

"Ah, yes. He saved your life."

"It was suicide! I saved my friends!"

"You're friends are fine! Trust me, nobody saw anything."

We jolted to a stop, and Sam helped me carry Cas out of the box.
Anger was bubbling up inside me as Sam and I desperately felt for a pulse from Cas. There was nothing. The Doctor and Sherlock were arguing, but I couldn't hear a word of it over the sound of my own thoughts. Sam was strangely quiet.

I couldn't help shouting. I turned around and screamed at the blue box man.

"YOU KILLED HIM YOU SON OF A BITCH!! YOU AND YOUR STUPID BLUE BOX! TO SAVE SOMEONE WHO DOESN'T WANT TO BE SAVED!!"

"Dean-"

"YOU BASTARD!! YOU THINK YOU CAN WALTZ IN HERE AND TELL US TO GO WITH YOU IN TIME AND SPACE? CAS WAS THE ONLY ONE WHO TRUSTED YOU- LOOK WHERE IT GOT HIM!!"

"If you'd give me a second" said the second British guy "you're trench coated friend isn't dead"

I glanced up at 'Sherlock'. Any hope of Cas living.... But Sam took the words out of my mouth.

"What? How? How can you tell?"

"He's not dead, he's in extreme shock. He will be dead within the hour if we don't-"

"If we don't get his grace back in him. Doctor dude, open that thingamawhatsit again."

"I can't open the Tardis. It'd blow us all up! Well..."

"What?!"

"It's extremely dangerous."

"Will it save him?"

"Or fry his brain."

"Do it. Do it now."

"It will save his life.. But he won't have enough grace to do anything."

"But he'll still have grace?"

"Some. Enough to hold him out, but no powers."

"I don't care."

"He might be out for a few days.."

"FOR CHUCK- GOD'S- SAKE WILL HE LIVE?"

"Yes. Chuck?"

"It's a long story" Sam clarified(ish)

"Okay. Give him here."

"No."

"Look! I'm the only one who can withstand that kind of power. Give him to me or he will die!"

I reluctantly handed Cas to this Doctor guy.

"Grace? What's grace? Where are we?"

"He's an angel, we just time traveled. We're in my living room."

"You... Stressed, two guns, heh.. Daddy issues, you're in denial about-"

"Okay! What the hell? Are you a psychic? A psychopath?"

"I'm not a psychopath. I'm a high-functioning sociopath. In your hou-"

A loud scream and a bright light emanated from the Tardis, cutting the detective off.

"Cas!" Sam and I said in unison.

I rushed to the door and tried to open it, but the handle burned my hand.

"Who is that? In there?"

"The doctor. I think. I'm Sam by the way, that's my brother Dean."

"No. The other one."

"Cas? He's our friend."

"He's your brothers-"

"Will you two shut up?!"

The light fadeded from the window and the high pitched screams stopped.

"Cas?" I pushed open the door.

"Dean." His voice was strained.

I ran to the other side of the room thing and went to help him up.

"Don't touch him! He might sill spontaneously combust."

I stepped back. That was the last thing I wanted. Cas grabbed the bar and pulled himself up, obviously in pain.

"What happened? What.. Who's that?"

"Sherlock Holmes."

"Pleasure." He gasped, falling again. It took all my willpower not to grab him.

"Doctor, is he going to be okay?"

"He seems stable enough now, I'd say yes."

The Doctor helped get Cas up and out of the Tardis, then sat him down in one of the chairs.

"Okay. Now every British person in this room, get in that box and GET THE HELL OUT!"

"Geez. You're welcome."

"For what, exactly?"

"My Tardis saved Castiel's life!"

"It's the reason his life needed saving in the first place! So leave!"

He put his hands up and nodded.

"Okay Sherlock, let's go."

With that, they got in the box and that noise echoed through the bunker again. Then, they were gone.

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Not my best, but I love Superwholock so whatever