Doctor Who Series 4 Finale

Finally, the moment all Dr Who fans have been waiting patiently for! Well last night's episode was pretty good but a little confusing at the end. I thought that David Tennant was supposed to stay on and do the four specials next year not regenerate before the end of the fourth series! My theory is that the daleks have somehow made him start to regenerate but he won't quite get round to finishing it anytime soon(Jack delays the process perhaps?).

My local paper this morning mentioned that one person definetely dies this coming Saturday. :( I've decided to try and guess who by a process of elimination: it can't be Sarah Jane because there's a second series of the Sarah Jane Adventures due out later this year, it can't be the Doctor(obviously), there's only a million in one chance it could be Jack(again, practically impossible), Rose - possibly, but that's just nasty considering she's just came to Earth from a parallel world, Martha - please, I'm praying it's her - can't stand her at all! But, generally, everyone else likes her so it might not be her. And then there's Donna. I think it'll probably be her. She'll either die for the Doctor or go and do something incredibly stupid like try to argue with a dalek! Either way, next week's Doctor Who looks set to be sad one! Prepare for tears guys! :(