As well as a new face, the Doctor has a new style with a tailored brown calf-length coat over a blue pinstripe suit and white plimsolls.
David calls it "geek chic - I wanted something that would look good and feel right."
But for most of his debut, David will be seen tucked up in bed in his pyjamas as the regeneration process takes its toll on his body. At the same time, the earth is being invaded by aliens.
