Face of Boe: I had grown tired with the universe, Doctor, but you have taught me to look at it anew.
Doctor: There are legends, you know, saying that you're millions of years old.
Face of Boe: That would be impossible.
Doctor: Wouldn't it just. I got the impression there was something you wanted to tell me.
Face of Boe: The great secret.
Doctor: So the legend says.
Face of Boe: It can wait.
Doctor: Oh, does it have to?
Face of Boe: We shall meet again, Doctor. For the third time, for the last time. And the truth shall be told. Until that day... (disappears)
Doctor: That is enigmatic. That... That is textbook enigmatic.