Location: Cwmtaff, Wales
It is the most important day in the history of Earth: the dawn of a new age of harmonyâ€¦ or the start of its final war.
The Doctor must face his most difficult challenge yet and he tries desperately to ensure Alaya's prediction of a massacre does not come true. Meanwhile, what fate will befall the captured Amy and can Tony and his friends be trusted?
Aired: 29 May 2010