I guess it's just started in Austrlia, since it's coming to it's penultimate episode in the UK this week. I happened to miss most of the second episode. I saw the earth blow up, but kinda lost out on the plot, other than the last human alive being a flap of stretched skin. Freaky.
I'll do my best not to spoil anything for you, but 'Dalek' is a great episode (plus Bruno Langly is in it *swoon*), and the most recent 2 parter in the UK, set in World War II is well creepy.