Peter Jackson officially begins his run as the 12th Doctor on 2015 's ' Doctor Who ' premiere . The new Doctor is very different from the last Doctor . Clara back how we remember her . Jenna Coleman 's Clara is a standout in the show . Previous Doctor , Matt Smith , makes a surprise return .
Peter Jackson officially begins his run as the 12th Doctor on 2015 's ' Doctor Who ' premiere . The new Doctor is very different from the last Doctor . Jenna Coleman 's Clara is a standout in the show . Previous Doctor , Matt Smith , makes a surprise return .