Clara Oswald, supernanny.
Listen. This is just a dream. But very clever people can hear dreams. So, please, just listen. I know you’re afraid, but being afraid is all right.
Twelve’s first words upon awaking in “Listen” were the Fourth Doctor’s first words after regenerating.
Let me tell you something about scared. Your heart is beating so hard I can feel it through your hands. There’s so much blood and oxygen pumping through your brain it’s like rocket fuel. Right now you can run faster and fight harder and jump higher than ever in your life, and you’re so alert it’s like you can slow down time. What’s wrong with scared - scared is a super power. Scared is your super power. There is danger in this room and guess what? It’s you.
Focus on the dream, focus on the details, picture them, feel them. The TARDIS will track on your subconscious and extract the relevant information. It should be able to home in on the moment in your timeline when you first had that dream.