TIME: You can leave here, but you won't outrun me. Your time is heading to its end.

DOCTOR: No, it's not. You're wrong.

TIME: Nothing is forever. No regeneration, no life. Beware of the forces that mass against you. And their Master.

DOCTOR: What do you mean? What do you mean, their Master?

TIME: I restore you, Doctor. Reunify you. But for how long?