Doctor: Rose, it's me. Honestly, it's me. I was dying. To save my own life I changed my body. Every single cell, but... it's still me.

Rose Tyler: You can't be.

Doctor: Then how could I remember this? Very first word I ever said to you. Trapped in that cellar. Surrounded by shop window dummies.... oh... such a long time ago. I took your hand... I said one word... just one word, I said... "Run".

Rose Tyler: Doctor.

Doctor: Hello. And we never stopped, did we? All across the universe. Running, running, running... One time we had to hop. Do you remember? Hopping for our lives. Yeah? All that hopping? Remember hopping for your life? Yeah?! Hop? With the...