What can I say. Simply the best episode of the season. The title gave away the surprise, but it was handled well. I loved the concept of a lone Dalek survivor. I loved the fact that even a single Dalek could be so very dangerous. I liked the new updated Dalek design. I liked the salute to the classic series in that Rose though that stairs would defeat the Dalek. Most of all I liked the complete turn around and the Doctor behaving more like a Dalek. The resolution was inevitable, and a bit of a cop out, but it did not spoil a great episode. It certainly got the formula right. Good reveal of the enemy, good chase scenes, good level of danger and cliffhangers, great character acting. If th new Doctor Who continues like this it will be huge.