I didn't know what else to do. I ran. It's self-preservation I guess. You see something. It wants you dead. You run.

I didn't know what I was running from, and I didn't know where I was going. To be perfectly honest, I didn't really know where I was to begin with. Some planet, far away from home, with a funny name.

I could hear the... thing catching up with me. It was getting closer and I knew I had no hope of out-running a six-legged-psyco-monster that was trying to kill me. Still, I kept running, because I knew that if I had no hope of saving myself, he would save me. It's what he does.

He is the Doctor