The mystery of the first question dominates Matt Smith's time on Doctor Who. 1 / 7
The Doctor thought Gallifrey was destroyed in the Time War. 2 / 7
And the Eleventh Doctor discovered cracks in time throughout the universe. 3 / 7
Dorian told of an ancient question, "Doctor who?" that could cause silence to fall. 4 / 7
The question was a passcode Gallifrey used to come through a crack on Trenzalore. 5 / 7
The answer was the Doctor's real name, but answering would trigger a second Time War. 6 / 7
Ultimately, the first question goes unanswered. 7 / 7