The Doctor: Rose... before I go, I just want to tell you: you were fantastic. Absolutely fantastic. And do you know what? [Pause] So was I!

In the end I sort of though we created a companion who was so alive and dynamic and so wedded to the doctor that you’d need a whole universe to contain her in. The only way to get rid of her is to send her into a parallel world from which she can never return; otherwise she would stay with the doctor forever.

Drama's not safe and it's not pretty and it's not kind. People expect the basic template of television drama where there might be naughty villains, but everyone ends up having a nice cup of tea. You've got to do big moral choices and show the terrible things people do in terrible situations. Drama is failing if it doesn't do that.

I hate the idea that I have to represent any particular section of society; I just write good telly, that's all.

There's nothing better than a party that turns into a death trap.

Rose Tyler: Can't you come through properly? The Doctor: Then the whole thing would fracture. The two universes would collapse. Rose Tyler: So?

Captain Jack: Rose, you are worth fighting for. [Jack kisses Rose passionately] Captain Jack: Wish I'd never met you, Doctor, I was much better off as a coward. [Jack kisses the Doctor the same way]