Played by: William Hartnell.
Appearance: Edwardian gentleman with slicked-back raver's bob.
Character traits: Mardy, feisty and a bit know-it-all.
Best moment: Facing down the Cybermen in The Tenth Planet with jutting chin and flaring nostrils. And then regenerating, which came as a bit of a shock to everyone, as you can imagine.
Best story: The Daleks' Master Plan - a 12-episode romp through time and space from 1965 that is the longest single Doctor Who story and the first to feature the death of a companion (Sara Kingdom).