This episode was the best Doctor Who I've seen in quite some time. mind you, in dealing with some major changes in my personal life (an explanation for my hiatus) it's the only Doctor Who that I've seen since probably the Christmas episode, but the point still stands.
So, why was it so good? The first few ten minutes of the episode brought us to the past of Doctor Who, with visits to The Shadow Proclamation and Karn (and the Sisterhood), glimpses of ood, and I believe one Sycorax, a new, em, creature, Colony Sarff. But before all that, the name of the boy who was not going to die that day: Davros. (It's not a spoiler if it happened before the title sequence, right?)