The Doctor: The Fourth Great and Bountiful Human Empire. And there it is: planet Earth at its height. Covered with megacities, five moons, population 96 billion. The hub of a galactic domain, stretching across a million planets, a million species. With mankind right in the middle. [Adam faints] The Doctor: [leans towards Rose, still looking out over the Earth] He's your boyfriend.

...Something we once loved, and love now, in the shape of a book. Maybe eBooks are going to take over, one day, but not until those whizzkids in Silicon Valley invent a way to bend the corners, fold the spine, yellow the pages, add a coffee ring or two and allow the plastic tablet to fall open at a favorite page.

There's one tiny little gap in the universe left, just about to close. And it takes a lot of power to send this projection. I'm in orbit around a supernova. I'm burning up a sun just to say good bye.

Cyber Leader: Daleks, be warned. You have declared war upon the Cybermen. Dalek Sec: This is not war - this is pest control! Cyber Leader: We have five million Cybermen. How many are you? Dalek Sec: Four. Cyber Leader: You would destroy the Cybermen with four Daleks? Dalek Sec: We would destroy the Cybermen with one Dalek! You superior in only one respect. Cyber Leader: What is that? Dalek Sec: You are better at dying.

...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.

I love having debates with people when they are debates but some people, you just can't. Some people shouldn't be given the oxygen.

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.