1. Summed up in one sentence The one in which the ninth Doctor makes us all cry a lot because we love him so much. 2. The Doctor He goes through a lot of changes in this last episode, and I do mean more than in the physical regeneration way. This entire season has been a journey of transformation for him, starting from the moment he met Rose. Though all the Doctors have very similar core personalities and behaviors, Nine is on the serious, guilt ridden, and combative side of the spectrum. He was just heavy, despite his delightful moments of humor and whimsy. But Rose helped both his hearts to soften and lighten, giving him someone to believe in and care for and love. We see his final moment of metamorphosis (before the literal one that is) when the leader of the Daleks asks the Doctor if he is a killer or a coward, because the Doctor has the choice to kill the Daleks, but it also ends up killing humans too, or allowing the Daleks to live so they can tr...