DOCTOR: I can't change what's already happened. There are rules.

CLARA: So break them. And anyway, you owe me. You've made yourself essential to me. You've given me something else to, to be. And you can't do that and then die. It's not fair.

DOCTOR: Clara.

CLARA: No. Doctor, I don't care about your rules or your bloody survivor's guilt. If you love me in any way, you'll come back. Doctor, are you?