Emma's pov. Btw there's quite a lot of time/adventures between these stories that's unrelated/unwritten.

"Get down!" the Doctor shouted as he tackled me to the ground to avoid the flying sparks spraying from the console. The Tardis lurched to the side and spun a bit before coming to a sudden halt.
"Wow," I said out of breath. "You are really bad at flying this thing."
"Oi, I'm the best you'll get!" he defended.
"Some how I doubt that," I teased. I stood up and almost crashed into some weird mechanism hanging from the ceiling. "Whoa. What's that?"
"Huh?" the Doctor turned to me. "Oh that's a Chameleon Arch. It must've fallen down when we crashed."
"A what?" I questioned, though somehow the phrase sounded familiar.
"Chameleon Arch," he repeated. "It can, basically change your species. I used it once to hide from these aliens that could smell I was a timelord. It puts your memories into this watch." He pointed to the pocket watch attached to the headset.
"Wait, so you turn into a different species and you don't remember?" I questioned.
"Yep, when you open the watch you get all your memories back," he replied simply. An alarm went off and he sighed. "Stay here this might take awhile." He grabbed some tools and took off down the hall. I ran the information though my head. I got a bit of a headache, it was like some of the words were echoing through my mind. I looked at the watch again and my eyes widened. I felt my heart skip a beat. My legs gave out so I sat of the metal grated step, staring at the door. I felt like I was in a trance. I slowly slipped my hand into my pocket and wrapped my fingers around the cool metal. I pulled out the fob watch and stared at it in awe. I traced the familiar engravings. I had had it since as long as I can remember. Some how I had never recognized that the circular designs engraved on it matched the Gallifreyan writing I'd seen around the Tardis. I stared at the watch for what felt like hours. Was I an alien? Was I a timelord?
I turned around to see that the Doctor still hadn't come back. I ran through my options. I could open this watch and see what happens or I could ignore it and forget I ever saw it and live forever wondering. I closed my eyes. Did I want this? I don't know who I am. I opened my eyes and stared at the watch.
Slowly, I clasped my fingers on the latch and popped it open. I felt my heartbeat get faster as streams and streams of golden light flowed from the watch and engulfed me. It all came back like a light being turned on in a dark room. I remembered. Everything. My heartbeat accelerated until it distinctly separated into two beats. Suddenly it vanished and I gasped for air. I found myself laying on the cold metal floor. I sat up and held my head in my hands. I remembered everything, my whole life and I only said one word.
"Captain," I breathed. I have to find the Captain. I got to my feet and scoured my memory. It was Maddie! Maddie from eighth grade, Gingerzap. One of my best friends who just so happened to be the Doctor's companion as well. I picked up the watch and a key fell out and clattered to the ground. I picked it up and held it in my hand. It was the Tardis key. Our Tardis key. I put it around my neck and pocketed the Doctor's Tardis key. I had to find it. I had to find the Captain.
I stumbled over to the console and looked it over. Man his Tardis is so junked up! I recognized enough of the parts to fly his Tardis into the vortex. He was bound to notice that. Okay, Tardis, come on think think think, I thought to myself. Eighth grade, what seemed all perception filtery way back in eighth grade. Then it dawned on me. That empty locker, 652. It had no com, it was right next to mine! I flipped a few levers and landed the Tardis (it was probably this Tardis's smoothest landing ever).
"Emma!" I heard the Doctor call as he came running down the hall.
"Sorry, Doc," I said under my breath. I erased my history and rigged a setting I had come upon way back before the war. It made the Tardis return to it's previous destination after the door closed. I dashed over and opened the door. I turned to look back just as the Doctor came running into the control room. I could tell he was about to shout something as I stepped out and closed the door behind me.
I stepped out into the familiar carpeted hall of the middle school as the Tardis disappeared. The hallway was dim and quiet, probably after school hours. I walked along the hall and read all of the locker numbers as I did. I really hope I was right about this. I passed our old classroom and smiled as the memories came back, that been an interesting year, and the Captain had been there the whole time. I reached my old locker and stopped in front of locker 652. I stared at it. I pulled out my key and held my breath as I slipped it into the lock. It clicked. I smiled and turned the key. The door swung open. I took the key and slipped inside, closing the door behind me. I made my way through the dark before I stumbled into the console. I had memorized these control panels so many times I didn't need to see. I turned on the lights and smiled as the control room lit up. It was just the way we'd left it, perfect.
"Oh baby you're a sight for sore eyes," I said to myself. I did a full circle before running up the stairs to my room. It was good to be home. I found myself in the wardrobe next. I changed into boots, jeans, and a pale blue tank top under a heathered grey henley shirt. I topped it with a black bomber jacket and stashed the bigger on the inside pockets with whatever I found necessary like my sonic screwdriver, the key to the Doctor's Tardis, duct tape, and a camera. I slung my fob watch and key around my neck as I made my way back to the control room. It was time to fly again. For the first time in a long time. I'm coming to find you, Captain, I told myself.
"Ready or not," I whispered to myself as I adjusted the atom accelerator. "Here I come."