Every person on earth, and probably a good proportion of other life forms, is in a numb kind of shock. First there’s some kind of earthquake, felt in every country at the same time, which is terrifying enough. Then, when the shaking subsides and people venture outside, they find the sun has vanished; night reigns supreme over every part of the planet, and in the sky, looming large and far closer than should be possible, hang strange planets, alien worlds never seen before.
Panic is widespread; nobody knows what just happened.
Martha tries to call the Doctor; there’s no answer.