I am trying to hard not to say anything to many international fans who haven't seen it yet but that was AMAZING. Meanwhile, Russell has been talking to Digital Spy!
This section is quite interesting:
How hard is writing a regeneration scene?
"You don’t know if there’s going to be one! Nice try. Well I’ve written two already; one for Chris and a fake one for David. The whole show keeps you on your toes. I can’t promise you anything. You think you’re going to see a regeneration, but I can’t say you’re going to see anything for the reason you think you’re going to see. We get more viewers each year by playing this game with people that we don’t give away too much."