The first actor to portray The Doctor in the BBC television program, originally premiering as the first doctor on 23rd of November 1963 in "An Unearthly Child". His companion was his "Granddaughter", Susan Foreman. He was replaced by Patrick Throughton on the 5th of November 1966 in "The Power Of The Daleks"
The Doctor: One day, I shall come back. Yes, I shall come back. Until then, there must be no regrets, no tears, no anxieties. Just go forward in all your beliefs, and prove to me I am not mistaken in mine. (William Hartnell as The Doctor)