The first episode of Doctor Who was broadcast on the BBC on November 23, 1963. 39 seasons allow the number of episodes to reach almost 900, although close than a hundred have been lost.
This Doctor has been played by 12 actors and one actress, with the addition of John Hurt as a parallel Doctor and the imminent arrival of a new performer in a new season. The Doctor never travels alone, he always does so with one or more companions, which causes his partners to vary and the plots to expand beyond words.