I am looking forward to the finale, based purely on this episode. However, I am looking forward more to Russell T Davies leaving his poor writing skills behind.
This episode required too much suspension of disbelief and contained very very little in the way of explanation. (as has been mentioned, the potions, but my major gripe was the lightning and flying - I probably missed the explanation tbh). That and the CGI transformation sequence was fantastic guys. Well done. It's not like you've managed them far better in the past and I understand how low the budget was...
Still, an excellent episode, but I fear for the finale, what with it being in the hands of RTD.
(Also Matt Smith is going to have to be truly amazing to top David Tennant, but that's another thing entirely)