The Doctor is captured by Styggron and left to die in the destruction of the fake village but Sarah escapes from the disorientation chamber to try and rescue him.
Everything is fake - an alien training ground staged by Styggron of the Kraals to train android duplicates to quietly invade Earth, substitute themselves, take over, then eradicate the human race without a shot fired. Now if only the Doctor, stranded without his TARDIS, can reach Earth first.—statmanjeff