The Doctor: Lin and that creature. They're together.
Mitch: You mean, it's holding her hostage?
The Doctor: I'm really sorry, Mitch, I think it's crueler than that. I think it's using her to move about.
Mitch: How can you be so sure?
The Doctor: I learn to think like a Dalek a long time ago.

Mitch: Where are you going? What are you doing?
Graham: Just follow and do what she says, mate.

The Doctor: There's been a Dalek buried on Earth since the 9th Century, waiting to revive.
Mitch: I'm sorry. A what?
Graham: Alien psychopath.

Ok, listen. Here's what you find out when you get older. There are things you've done in your life... to others, the decisions you've made, maybe when things were difficult. You get it wrong. But by the time you've realized you've got it wrong, it's too late. You can't fix it because the damage is done. So you run 'cause you're too ashamed to make it right. That's what I did.

Aaron

Doctor? I don't like it when you go quiet.

Yaz

Family isn't just about DNA, Aaron. Or a name. It's about what you do. And you haven't done enough.

Graham

None of know for sure what's out there. That's why we keep looking. Keep your faith. Travel hopefully. The universe will surprise you. Constantly.

The Doctor

Ryan: Hey! You shot him!
Graham: Yeah, but just the foot. Just in the foot. Just to shut him up. Don't tell The Doc. She'll be livid.

Tim Shaw: You are no warrior.
Graham: No. I'm the better man.

Andinio: I don't have to answer all these questions.
The Doctor: That's what my teachers used to say. Usually, just as they quit teaching.

Ryan: You think that's what Nan would want?
Graham: No, I think your Nan would want to be alive. She actually liked being alive and she was really good at it. And she'd say to me,'Graham, if you get the chance, you send that little piece of rubbish to kingdom come,' Because, you know why? Your Nan might've been kind, but she was also tougher than you and me put together.

Whatever happened to doors? Don't aliens bother with doors?

Ryan

Doctor Who Quotes

Only in darkness are we revealed. [...] Goodness is not goodness that seeks advantage. Good is good in the final hour, in the deepest pit, without hope, without witness, without reward. Virtue is only virtue in extremis. This is what *he* believes, and this is the reason above all I love him, my husband. My madman in a box. My Doctor.

Nardole [quoting River Song]

Gallifreyan Soldier: There was a saying, sir, in the Time War.
Lord President Rassilon: A saying?!
Gallifreyan Soldier: First thing you notice about the Doctor of War is that he is unarmed. For many, it's also the last.