~Sherlock

      "But-but this is impossible!" I sputtered as I entered the police box. "It's smaller on the outside." I breathed. The Doctor and Rose just grinned and watched me go back outside and walk around the perimeter of the box. "How can it look bigger on the inside, but small on the outside?" I went to my mind palace, but I couldn't find any logical answers except one. The Doctor,  and possibly Rose, were aliens. I stepped back inside the police box and strode over to the Doctor. "So you said we were going to have a talk, lets talk then." The Doctor nodded and leaned against a series of control panels. I stayed standing where I was in the doorway. John stood over by me. The Winchesters were whispering in the corner. The Doctor cleared his throat to get their attention. They immediately stopped talking and turned to face him. "Now," the Doctor clapped his hands together. "You're all probably wondering what this is. Welcome to the TARDIS!" The Doctor gestured broadly around him, his chest swelled with pride. "It stands for time and relative dimension in space." Rose added. "Yes, and also in case you didn't figure this out already, I'm an-" "You're an alien." I finished. "Glad to see that one of us is perceptive. Anyway," the Doctor continued "Hang on, alien? Demons and angels are one thing, but aliens?!?" Dean interrupted. "Demons and angels? This is bloody mad." John grumbled. I hushed him and looked back at the Doctor. "Sherlock, how are you okay with this?" John hissed. I ignored him and waited for the Winchesters to stop arguing with the Doctor. "You." The Doctor pointed at me. "Everyone here is arguing how that can't be true...except you. Why?" "Because I can tell you're not lying. Your eyes aren't darting around, your palms are steady and not sweaty, and frankly that is the only logical option at the moment." I stated. Sam was impressed, but Dean looked like he wanted to punch me and break my nose even further. "Would you believe me if I told you that the TARDIS is a machine that can travel through space and time, I am from the planet Galliefrey, I'm the last of my kind,  and that I have two hearts?" The Doctor inquired. I nodded in response. "You have to be insane!" John blurted. I quieted him with a hand. "Go on," I folded my arms across my chest. "I am around 2,000 years old and that I have a process called regeneration, which means that if I'm about to die, I can change the way I look." The Doctor studied my expression. "I believe you." I said with a straight face. "I don't, for all I know, he can be a demon or an angel!" Dean shouted. "Demons and angels aren't real." The Doctor raised an eyebrow. "Oh, aliens can be real, that's fine, but monsters? Oh no!" Sam argued sarcastically. "Fine, tell us your story then." John replied calmly. They exchanged wary glances before beginning. "I'm Dean Winchester, this is my brother Sam, and we hunt monsters." Dean began. "Angels, Demons, Shapeshifters-" Sam listed. "You name it, we kill it." Dean interrupted with a cocky grin. "How long have you been hunting?" Rose queried. "Basically all of our lives." Dean shrugged. "Your turn Sherlock." Ten pairs of eyes stared at me as I cleared my throat. "I am a consulting detective from London, the only one in the world I might add, and I solve crimes the police can't." "Is that how come you were able to tell if I was lying or not?" The Doctor seemed genuinely curious. "And you could tell that we were on the FBI's most wanted list?" Sam added. "Yes, that's why." I answered. "Now John, tell us about you." John shifted uncomfortably as he began. "I was an army doctor in Afghanistan until I was wounded and sent back to London. For months on end I lived by myself...until I found 221B Baker street. I met Sherlock and Mrs. Hudson there and we solved my very first crime that I named 'A Study In Pink'....and basically I help Sherlock solve cases." John finished. "Alright we know more about everyone, now what?" Dean asked. "Shouldn't we go back to the crime scene?" Rose turned to look at the Doctor. "We got kicked out, remember?" Dean glared at me. "Then we use these." The Doctor pulled out a handful of brass keys on black strings. "I made lots just in case." He winked and handed a key to everybody. "Now, this key has a perception filter. People will still see you, but they can't focus on you." Rose explained. I slipped the key over my neck and turned to face John. I saw him, but I couldn't stop my gaze from shifting away from him after a couple of seconds. "Brilliant." I mumbled. "What are we waiting for? Allons-y!" The Doctor grabbed Rose's hand and ran out the door. Dean and Sam looked at each other before following. I followed close behind them with John struggling to keep up.

~Doctor

"Ah, I've missed this so much." I sighed. "Just you and me running and saving the universe." "I've missed you more." Rose squeezed my hand as we waited outside the house. Thankfully, I could see less police officers were here from the doorway, it was just two men one with gray hair and a black suit, and the other with black hair and also wearing a black suit. Sherlock went in first since he seemed to know the men. "Lestrade, Anderson." Sherlock greeted the men. "I'll take it from here." Lestrade just nodded and left, but Anderson complained under his breath as he stormed off. Sherlock mouthed "all clear". "At least we didn't really need the keys." I whispered to myself as I walked inside the house. "The family is staying with a relative." Sherlock informed us. I nodded went outside to the backyard where the girl disappeared. The strong scent of sulfur hadn't faded away still. "Sulfur, means that a demon was here." Sam sniffed the air. "And the sound..." I trailed off. "The Master. He's not dead." I gasped. " That's the only thing that would make sense," I spoke quickly. "Hang on, the Master? Who is he?" John asked. "The Master is the only other time lord that is-was still alive besides me, but he died a little under a thousand years ago." I explained hurriedly. Sherlock paused in the backyard and bent down to examine the grass. "There's a slight indention...a man's dress shoe, black, size six and a half." "Crowley." The Winchesters growled in unison. "Who?" John looked over at the brothers. "Crowley is the king of hell." Dean huffed in frustration. "He's a real dick." "Great. What's next, Moriarty?!?" John complained sarcastically. "Apparently yes." Sherlock showed us his black phone. On it was a text that read "You're not the only one who can cheat Death." John's face turned as pale as Sherlock's. "Awesome, who is he?" Sam grumbled. "Kind of like Sherlock, only he kills people to entertain Sherlock and kill him as well." John rubbed his chin with his hand. "I would argue except that surprisingly sounds accurate." Sherlock sighed. "Well what are we standing around for? Our worst enemies are back and we need a way to stop them!" Dean proclaimed. "Listen, why don't we all get some sleep and make a game plan tomorrow." I suggested. "You could all stay at the TARDIS." Rose looked over at me for permission. I nodded to show that it was okay. "I have plenty of room here as you can see, so please feel free to explore some once we get there." I led the group back into the TARDIS. "Call if you need anything!" I hollered as I walked down the hall with Rose. "Remember this room?" I gently pushed the door open. Inside was the old room that Rose slept in long ago. "I didn't know you still kept it!" Rose squealed and scanned the room. "Everything was exactly as it was all those years ago." I promised her. She beamed and enveloped me in a hug. "Thank you." She whispered in my ear. "Go ahead and get some sleep." I grinned and gently nudged her inside. I closed the door behind me as I left. I felt do happy knowing that now I wouldn't have to miss her. She will always be close to me, and I won't let anyone take her away, I promised myself as I went to check on the others. Dean had found the kitchen and was drinking a bottle of beer with Sam, John was asleep in his bedroom and Sherlock was pacing around the library that was by my swimming pool. I went to my own bedroom and flopped down in bed, still dressed in my tweed jacket, white shirt, and red bow tie. I removed my shoes and instantly fell asleep.