You are worthy of love and respect. You are beautiful, gifted, and intelligent. Don't let the storm make you forget it.

What Rose brings to the Doctor’s life is completion. It’s completing a circle – he’s male, he’s alien, he’s a traveler. Between the two of them together they complement each other and discover each other. And are in love with each other – absolutely, unashamedly, unreservedly.

Wilf: God bless the cactuses! The Doctor: That's cactI. Alien: And that's racist!

...The very word 'fiction' implies another world, literally a different place, whereas no one claims that a dedicated sportsman is escaping his life, or a chef or a nurse. But the poor writer - the sci-fi one especially - is seen as running away. Bollocks. This is real, for me, and it's tough, it's fun, it's practical, and it's very, very important.

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.

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

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.