i was soooo upset when David left, but i started watching all the old past doctors and that made me relies that the doctor is forever moving forward and backward and left/right :) but when Matt took over i loved it, first scene amazing. I've seen so many of Matt now that when i watch David as the doctor i miss matt's madness of him. then you watch Christopher and you forget how brilliant he was. i just love them all i think the final outcome :)