“Because every time you see them happy you remember how sad they’re going to be. And it breaks your heart. Because what’s the point in them being happy if they’re going to be sad later? The answer is, of course, because they are going to be sad later.”

“I hate computers and refuse to be bullied by them!”

DOCTOR: He asked you a question. Will you help me?

CLARA: You shouldn't have been listening.

DOCTOR: I wasn't. I didn't need to. That was me talking. You can't see me, can you? You look at me, and you can't see me. Have you any idea what that's like? I'm not on the phone, I'm right here, standing in front of you. Please, just, just see me.

“Everybody lives, Rose. Just this once, everybody lives!”

SARAH: So there's three of you?

ROSE: Three Doctors?

JACK: I can't tell you what I'm thinking right now.

“ (to Rose) Listen, you. I would burn down the world for you, darling. Anyone has a go, I will be there and I will descend.”

“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: You let one of them go, but that's nothing new. Every now and then, a little victim's spared because she smiled, because he's got freckles, because they begged. And that's how you live with yourself. That's how you slaughter millions. Because once in a while, on a whim, if the wind's in the right direction, you happen to be kind.

MARGARET: Only a killer would know that. Is that right? From what I've seen, your funny little happy go lucky little life leaves devastation in its wake. Always moving on because you dare not look back. Playing with so many peoples lives, you might as well be a god. And you're right, Doctor. You're absolutely right. Sometimes you let one go. Let me go.

DOCTOR: By the time I've called look out, what's your name?

ROMANA: Romanadvoratnelundar.

DOCTOR: By the time I've called that out, you could be dead. I'll call you Romana.

ROMANA: I don't like Romana.

DOCTOR: It's either Romana or Fred.

ROMANA: All right, call me Fred.

DOCTOR: Good. Come on, Romana.

“Even I am not immune to the occasional weakness. Oh, I can watch an entire city burn to the ground with barely a flicker of concern. But I only have to hear the opening lines of ‘Dido’s Lament’ and… floods of tears. Embarrassing really.”

MISSY: I am your friend.

DOCTOR: Makes no difference.

MISSY: I know it doesn't. I know I'm going to die. I have to say it, the truth. Without hope. Without witness. Without reward. I am your friend.

MASTER: Missy? Seriously, why?

MISSY: Oh, because he's right. Because it's time to stand with him. It's where we've always been going, and it's happening now, today. It's time to stand with the Doctor.

MASTER: No. Never. Missy! I will never stand with the Doctor!

MISSY: Yes, my dear, you will.

CHARLEY: Come on. Take my hand.

DOCTOR: But we can see now. We don’t need to hold on to each other.

CHARLEY: I know. Take my hand anyway.

LEELA: These taxes, they are like sacrifices to tribal gods?

DOCTOR: Well, roughly speaking, but paying tax is more painful.

TURLOUGH: If ever you had to kill someone, could you do it? Could you?

TEGAN: No. I don't know. If it was important, to save my friend, to defend myself.

TURLOUGH: But cold-bloodedly?

TEGAN: You're weird, Turlough.