Graham: And it has to be us does it? Answering these signals from this planet?
The Doctor: No, not at all. But everyone else has passed them by. Y'think we should do the same?

Graham: He's the commander.
Ryan: Maybe he killed his own crew.
Graham: Always one for the cheery option.

Ryan: What happened to 'never do weapons'?
The Doctor: It's a flexible creed. Door, locks, walls, buildings. Fair game. If it can be rebuilt, I'll allow it.

The Doctor: Grenades. As insurance policy.
Paltraki: You think that's smart?
The Doctor: I think it's a precaution. I like precautions. Always take precautions. Especially when you don't know what you're doing.

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

Ryan

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.

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.

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

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.

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

Graham

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

Yaz

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 Who Quotes

There's a horror movie named Alien? That's really offensive. No wonder everybody keeps invading you.

The Doctor

The Doctor: It's a risk.
Graham: Oh, like none of our other trips have ever been risky.
The Doctor: I have apologized for the Death Eye Turtle Army! Profusely.