The Doctor has come a long way since those humble beginnings in 1963 and we will soon see him change again when David Tennant makes way for another tenant ( sorry! ) in the Tardis. But it's worth remembering that it all started with this strange old man and his Police Box, hiding in a junkyard in London, waiting to take us on adventures in time and space.....
So, here's to all the hundreds of people who have worked on the show over the decades, and especially the late, great William Hartnell who first brought the character so vividly to life.
"Have you ever thought what it's like to be wanderers in the fourth dimension? Have you? To be exiles? Susan and I are cut off from our own planet, without friends or protection. But one day we shall get back. Yes, one day, one day....."
The Doctor - An Unearthly Child, November 23rd 1963.