The Doctor, Handles and others in “The Time of the Doctor”

If you were trying to break through a wall, you'd choose the weakest spot. If you were trying to break into this universe you'd choose this crack, because — No! If you were trying to break back into this universe! [to Handles] You said "Gallifrey"! Why did you say "Gallifrey"?

Analysis of message composition indicates Gallifreyan origin according to TARDIS data banks.

You said Gallifrey was gone.

No, I said it was in another universe. The message is coming through here. The truth field is, too, at a guess. If it's the Time Lords — if it's the Time Lords! [he produces a Gallifreyan seal from his pocket] Seal of the High Council of Gallifrey, nicked it off the Master in the Death Zone. There is an algorithm imprinted in the atomic structure. Use it to decode the message.

Message decoding. Message analysis proceeding. Information available: The message is a request for information.

It's a question! Why can't you just say it's a question?!

It is being projected through all of time and space on a repeating cycle.

[realizing] "The oldest question in the universe, hidden in plain sight."

Warning: Translation will be available to all life forms in range. Translation follows: "Doctor who?" "Doctor who?" "Doctor who?"