The girl and the Doctor cherished the moments when they were happy and carefree. When there was no need of running and fighting. They could just travel and find new places and experience all the universe had to offer.

They both knew that pain and suffering were to come and each had their struggle through everyday life. They each had their secrets, but they took the time to laugh and be supremely child-like together. The Doctor made sure the girl grasped each happy moment and made sure each moment was memorable. There were a lot of happy times.

But there were also the times that were heartbreaking.

"Doctor, I swear, if you don't fly this TARDIS faster, I will bite your head off." I clutched at my seat and tried not to fall off. The Doctor was flying the TARDIS recklessly at my request. The Doctor pulled a lever.

"Oh, you can't bite my head off; you've got a tooth ache. That's why we're going to the dentist." The Doctor danced around the console, still pulling lever and pressing buttons.

I clutched at my jaw as I was thrown off the chair and landed on the floor, skirt spilling around me. I got up, brushing my skirt, thanking any higher power that nothing was shown when I fell. Pain shot through my tooth and I clasped my jaw again.

"I wish River were here, she could get us there faster." I knew the Doctor would take offense to the statement, but I wasn't really in a nice state of mind. "I don't know how this happened. I have excellent dental hygiene. My dentist at home used to compliment me on it."

"Maybe it was something you ate." The Doctor relaxed as the TARDIS stopped moving. He turned and smiled. "We're here, out you go."

"Ugh, stupid alien food. I blame you for this." I stuck out my tongue and walked out of the TARDIS. "And now I have to see an alien dentist. As if my regular dentist wasn't bad enough." I stepped out of the TARDIS and into a waiting room. The TARDIS was in the center of the room and everyone else in the room was pushing themselves up against the nearest wall. Even the receptionist. I had to stop myself from chuckling. I walked up to the desk. "Hello, I wouldn't want to inconvenience the doctor, but I need him to help me. My tooth is acting up and it needs to be checked out." I smiled my most charming smile.

I don't know if it was my charm or the fact that huge police box landed in the room, but she nodded and immediately left the desk. I assumed she was conversing with the dentist. I walked back over to the TARDIS and knocked on the door. The Doctor's cheery face popped out and I smiled in return.

"Ok, so I think they can see me today. I'll probably just have to wait a while." The Doctor's smile dropped off his face at my statement. "I am a walk-in patient." The Doctor still looked a little upset. He was never good at waiting in a linear time sense. I slightly grinned.

"Well, how long will you have to wait? I can just pop us to that time and that'll be it." He smiled at his idea, but I shook my head.

"Look, I'm a big girl. Of course this is whatever century in the future, but I mean, come on, I can handle myself." I smiled and made to show my muscles, even though I didn't really have any to show. "You can pop out and go somewhere and I'll call when you need to pick me up." The Doctor's face lit up.

"That's a brilliant idea. Alright," He slammed the TARDIS door and I imagined he couldn't get out of the office fast enough.

"Just remember to pick up your phone!" I shouted as the TARDIS started to disappear. I looked around the reception room. There were only two people, so I took a seat at an empty chair and grabbed a magazine.

It might have been a tabloid, but I wasn't sure. The articles were about fashion and the scandal of some alien pop star dating a cyborg. I flipped through it a couple times, each time getting more and more confused at what I was reading. But it passed the time. The receptionist had come back out and told me the doctor would see me, but I still had to wait for the patients before me to go through.

One of the patients got up and walked through the door to see the dentist when their name was called. At least that part was still the same. The other patient walked up to the seat next to me and sat down.

"Excuse me," The woman spoke, well I don't know if she was human, but she was female. I turned my attention to the female before me. She had cat ears and a tail and paws. They moved with her, actually part of her body. "What species are you?" She seemed just as interested in my appearance as I was with hers. Her question still shocked me a bit.

"Oh, I'm human. You know, from Earth." I smiled. Her ears perked up and she leaned in closer to me, examining me.

"I've never seen a real, pureblood human before." I was getting a bit uncomfortable with her staring and proximity to me. I liked my personal space. I tried to smile and look pleasant, but inside I really just sort of wanted to get away from this woman. She leaned back suddenly. "I'm sorry; I don't usually act like this. You must realize, though, you are the only pureblood human on this planet."

I smiled and kept flipping through the same magazine. But I could feel her eyes on me. It was distracting. So I put own the magazine.

"So, what sort of species are you?" I asked, deciding to talk to her instead of just being uncomfortable. She smiled and I saw her canines were pointier than human teeth.

"My mother was part human, but my father was indigenous to this planet." I looked out the window in the room and saw many people walking around outside who looked a lot like her, but they looked much more cat-like.

"What is this dentist like?" At this point I was a bit worried about going to see a dentist on a cat planet. What if he filed down my teeth to points or injected me with something that killed me? My tooth gave a pang and I tried not to cringe.

"Well, he's mostly human. He's older. His grandparents came to this planet to start a new life and his mother married my uncle." She smiled.

"So you're related then." She nodded. "I'm sorry. I must seem rude. What's your name?"

"I'm sure you wouldn't be able to pronounce it. You can just call me Isis. Most people do." I chuckled a bit.

"You'd be surprised at what I can pronounce." The patient who went in before walked out. The receptionist told me to go back. I was confused. "Don't you have an appointment?" I turned to Isis. She smiled and shook her head.

"Not really, just a lunch appointment." I nodded and walked back through the door and into the room.

The walls were stark white. Well, everything was stark white. It unnerved me a bit; seeing the chair blend with the background, and all the tools and tables, harshly white. I was about to walk straight back out of the room and call the Doctor to leave. I figured I could live with the pain, but then my tooth reminded me that it needed to be fixed, immediately.

"Welcome, child, how are you?" A hand placed itself on my back and guided me to the chair, forcing me to sit down. I looked up at the man forcing me into the chair. He had cat ears and was wearing a surgeon's mask and goggles. It freaked me out a bit. I was about to protest.

But, of course, as soon as I was seated, his hands were in my mouth, feeling around. Then there was this scanner thing. I had no idea what was going on. The dentist just kept scanning my mouth and feeling around.

Finally he found that one tooth that was giving me problems.

I accidentally cried out in pain. He just sort of applied pressure to it and kept pressing on it, making it hurt more and more. I felt part of my mouth go numb and I could taste blood.

"Curious." He pulled up a computer of some sort. It was more like a touch screen in mid air. He poked around a bit on the display. I couldn't see anything on it. I could barely make out that there was a screen there. The more he touched the monitor the more confused he seemed to become. "This is impossible." He glanced in my direction and back at the computer. "What are you?" I tried not to get frightened by this incredibly scary figure before me and tried to answer.

"Uh, I'm human?" My answer came out as more of a question than an answer and I chided myself in my mind. I had travelled through time and space with the Doctor, but this seemingly friendly dentist wearing a mask scared me stiff. Daleks and Weeping Angels were worse than this, but still I was petrified.

"You can't be. There haven't been humans, pureblood, since the Discoveries." He looked as confused as I felt. "How have you gotten here?"

"Oh, I'm just-just travelling around with my friend, the Doctor. He and I are exploring really." The dentist's ears perked up as soon as I mentioned the Doctor. It was curious, but it didn't really occur to me that the interest in the Doctor could be sinister. My tooth was still hurting too much to think.

"Would still like me to treat you?" I didn't even take a second to nod my head. It took him less time to get everything set up. He grabbed a scary looking instrument and started to move it near my mouth. He contemplated it a bit. "No, this won't fit." He got up and rummaged through some cupboards. "Who gave you that splendid ring? If you don't mind me asking."

When the dentist had been fumbling through my mouth, it seemed my necklace with William's ring had become uncovered from inside my top. It almost never saw the light of day. Looking down at it, I got lost in the memories for a moment.

"It was my engagement ring," I muttered, not even realizing I was speaking out loud. "He's dead now. Nothing left of him, I suppose." I wiped at the lone tear that presented itself in my eye. I tucked my ring back in my shirt and straightened my skirt, messed with my hair.

"I'm sorry for you loss." A sad smile broke across my face.

"So am I."

"I lost someone very dear to me once, as well. Someone took her away from me and now she is dead. She moved to New New York to be a nurse and I was to join her, but she died before I could." I nodded in sympathy. I knew the feeling of losing someone. "Now, shall I proceed?" The dentist did his thing of fixing my tooth. By the time he was finished, there was absolutely no pain. I smiled and thanked him. He led me out of the room and to the reception area. I pulled out my phone and rang the Doctor. Of course, he didn't pick up the first time. Or the time after that.

I sat in one of the chairs. I picked up the same magazine from before. Isis had walked into the dentist's room as soon as I walked out. Waiting for the Doctor took maybe five minutes before the TARDIS started to materialize before me.

"Took enough time," I sighed under my breath. But I smiled as I saw who was flying the TARDIS, or at least who stuck their head out. "Hello, River." She smiled warmly at me. I had met River Song before and we got along great because I wasn't in love with the Doctor.

"Hello, dear. Tooth all better?" I nodded and followed her into the TARDIS. I stood at the console, leaning on my hands. "That's a lovely outfit." I smiled and looked down at what I was wearing.

"Love your hair, River." It was what we always did. She liked my clothes and I loved her hair. It was like our way of catching up and saying hello. "So, Doctor, what have you two been up to while I was at the dentist?" They looked at each other, the Doctor cleared his throat and River responded.

"We were battling some evil aliens. You know the usual." I smiled. Of course, I knew they probably went out on a date or something. They were actually rather cute together. I absentmindedly started to play with the necklace with William's ring on it. River obviously took note of it. The Doctor obviously avoided noticing it.

Then again, the Doctor was bouncing around, flying us somewhere. I didn't know where we were going, but that was the adventure of it. That was why I loved traveling with the Doctor. There was always some sort of brilliant surprise.

The TARDIS stopped moving and the Doctor looked confused. River walked up behind him as they looked at the scanner. I walked up behind them. But what was on the screen was not something that I could decipher. It looked to be in some kind of code.

"Doctor, what does that say?" The Doctor and River turned around slowly. I was confused; they looked at me like something was utterly and terribly wrong with me. Like I not only had three heads, but my skin was blue with purple spikes running down my back. Which I knew was not the case. I was the same as I always was. I was Rachel Clover, or Rachel Foster for the Doctor, and I had just gone to the dentist because my tooth was aching.

"Who are you?" The Doctor was staring at me with an anger that scared me. "Who are you?" He asked more forcefully this time. I couldn't speak. I could only stutter. "You aren't Rachel Foster, you're something else. The TARDIS hates you. She's trying to get rid of you. She wants you out. She refuses to touch you." All emotion escaped my grasp except fright and misunderstanding.

"She won't even translate the languages in my head like she's supposed to." I grasped my head. My hair cascaded over my shoulders. "This can't be happening, Doctor, it's me, Rachel. Nothing happened. I just went to the dentist is all." I grasped at my shirt and my skirt, trying to figure out what was wrong.

"Rachel," River addressed me. "The scanner says that the only things alive in the TARDIS are the Doctor and I." She turned back to the scanner, speaking to the Doctor. "What's wrong? That is Rachel. Why won't the TARDIS recognize her?" I backed up as the Doctor walked towards me. I landed on the chair and was forced to sit down. The Doctor took out his sonic screwdriver and pointed it at me.

The sound of the screwdriver pierced through my ears. It was so high pitched; hurt my ears so badly. I felt as though I might faint. I thought I did. Except I didn't faint, I was completely awake, but I didn't have control over my body. I stood up, pushing the Doctor away from me. He dropped his sonic screwdriver and it fell down through the open space, down by all the wires.

"Doctor, what's happening?" I kept walking forward, to the controls of the TARDIS.

"You're not doing this yourself?" The Doctor stared at me. River ran down to get the screwdriver back. I reached out for the controls, but the Doctor held me back. Or at least, he tried to.

"Doctor, I don't know what I'm doing. I'm certainly not doing this myself." I pushed the Doctor off me and he slammed to the floor. I tried to walk over to check if he was alright, to take back control of my body, but I couldn't. Whatever was happening to my body, I wasn't controlling it. River rushed back up, sonic screwdriver in hand.

"Doctor!" River rushed over to him, made sure his pulse was alright. "You knocked him unconscious?" My body started pulling and pressing and switching things around. The TARDIS started moving, but I had no idea what I was trying to do.

"River, stop me, please, what am I doing?" River ran up to me, well, rather behind me. "River?" She continued to watch me.

"Rachel, stop what you're doing." River started pulling things and pushing things as well. I groaned.

"Do you think I'm not trying to stop?" I had enough control over my head to glance at her and she looked at me.

"Rachel, you're flying us into the heart of the sun. We'll all die." I looked at my hands. They were moving on their own accord. I tried to think of something, anything that would stop what I was doing.

My hands kept grabbing at the controls and River kept working so that she could try to reverse what I was doing.

"Rachel Foster, what are you doing?" The Doctor had regained consciousness and was standing right behind me. "Do you really want to do this? Think about this. Think about something happy. Think about William."

"Doctor," I sniveled. "You know that isn't exactly a happy thought." Tears welled up in my eyes and I couldn't even try to wipe them away.

"Now, you and I both know that is a lie. When you were with William, you were happy. I know you were happy because leaving him crushed you worse than I've seen happen to anyone." I tried to shake my tears away. The Doctor knew it was too painful for me to hear this. "I took you away from him. I made you leave him. If I had never found you, you could have had this and all that comes with it. You could have had a nice human, happy life." The Doctor yanked at the necklace around my neck and shoved the ring into my line of vision. "You should have been angry with me. But you just cried and cried until you couldn't cry anymore. And that's how I knew you left the only happy place you had ever known."

"Doctor, I don't think what you're doing is helping," River shouted at the Doctor. But she couldn't see my hands. They were slowing in their movement.

But I still didn't want to hear what the Doctor had to say. "Doctor, stop, please." I pleaded with him. To hear all of this from his lips and of all times now, it just hurt like a bullet slowly being driven through my chest. I had left William behind a few adventures ago. I was starting to accept I would never go back to him. I was finally starting to feel better about it. I ground my teeth together, trying to stop myself from sobbing.

"Think of all the pain that I've caused you, Rachel Foster. Why are you here? " He grasped my shoulders and pulled me away from the controls, hugging me as I fell to the ground. He held me as I cried like he hadn't the first time. River looked on in amazement. I tasted metal in my mouth. I spat and there was a small, almost too tiny to see, little metal chip. The Doctor didn't pick it up until I stopped crying. Once I was done, I got up and looked at the scanner. My cheeks felt raw and I didn't even want to look in the mirror. I knew I looked a right mess and I felt like one too.

"Doctor," I asked as I looked at the scanner, now completely written in English. "What happened exactly?" I sniffed and pressed down my hair. I straightened my clothing, trying to play it all off as though nothing had happened.

"I think that dentist you went to put this chip in your tooth. It was like mind control. He wanted you to crash the TARDIS in the heart of the sun. If I'm not mistaken, I might have accidentally killed his love?" The Doctor looked at me for confirmation.

"In New New York?" I remembered what the dentist had said about the love of his life; the nurse that died before they could be reunited. The Doctor nodded.

"I see, so this was revenge. I'm sorry you had to be in the middle of this." I nodded as the Doctor continued to analyze the chip from my mouth. "Well, I guess I should explain why I said what I said." The Doctor cleared his throat and adjusted his bowtie. "The only way to keep you from driving the TARDIS into the center of the sun was to make you feel utter pain so that this chip here would disconnect from your nerves. I'm sorry. I know it wasn't pleasant. I would have used the screwdriver if in the process your head wouldn't have exploded." I nodded and sat down on the bench.

River came up and sat next to me. She put her arm around me as a comfort and it helped. If only just a little bit.

"So is it over then, Doctor?"River looked at the Doctor, waiting for an answer. He turned around, smiling.

"Of course, River. Rachel is fine and all things are dandy." He started to dance around the controls probably taking us somewhere far away from wherever we were at the moment. River rubbed my back, squeezed my arm and walked over to help the Doctor fly the TARDIS.

They looked so happy. And I smiled along with them. They joked and flirted nonstop with each other. We dropped River off back at her cell and the Doctor walked back into the TARDIS, blushing.

"You alright, Doctor?" I smiled at him. Though I'm sure the smile, as they say, didn't reach my eyes. The Doctor smiled back.

"Of course I am, Rachel Foster." I smiled at the name. "And you?"

"Why wouldn't I be?" We smiled and the Doctor tried to make me laugh as we flew through the time vortex. But, really, I just felt empty.