DOCTOR: If there’s anyone in this universe who’s an expert on running, Magda, it’d be me. I’ve run away from things you’ve never dreamed. Towards things from your worst nightmares. I’ve gone further than any of you could imagine. And you know what I learned? Sometimes, running is the bravest thing you can do. Because running away? That’s still making a choice. It’s telling someone or something no. It’s you saying “No universe, not today!” Because you still have things left to do and see and live. Giving up? Leaving your fate to the monsters on your trail? I have to think that running is braver than that.

DOCTOR: Seeing monsters everywhere is one of the quickest paths to becoming one.