“Every great decision creates ripples, like a huge boulder dropped in a lake. The ripples merge and rebound off the banks in unforeseeable ways. The heavier the decision, the larger the waves, the more uncertain the consequences.”

“Anybody remotely interesting is mad in some way or another.”

“There are worlds out there where the sky is burning, where the sea's asleep, and the rivers dream. People made of smoke, and cities made of song. Somewhere there's danger, somewhere there's injustice, and somewhere else the tea's getting cold. Come on, Ace, we've got work to do!”

“Fear makes companions of all of us.”

“You don’t need me telling you your family isn’t always the one you were born in. Usually it is, and that’s great, that’s fantastic, but it’s not always like that, and that’s ok. And if you do find people who love you - hold on tight.”

DOCTOR: I’ve always wondered. Why isn’t “phonetic” spelt with an “F”?

ROSE: I can teach you how to spell “Doctor” with an “F”.

I.M. FOREMAN: You’ve never been a woman, have you?

DOCTOR: I’m not sure I’ve ever even been a man.

LUCIE: What did you say it stood for again? Time And Relative Dimensions...

THE DOCTOR: Yes..

LUCIE: Time And Relative Dimensions In Shed.

THE DOCTOR: That is not what is stands for.

LUCIE: Yes it does. It's a shed.

“As my mum told me once - don't put anything off until tomorrow... Except giving up.”

BREGMAN: You want to go there? Why, for God’s sake?

DOCTOR: I’m half-stupid. On my mother’s side.