The longest-running science fiction series of all time started 48 years ago today. 783 episodes and 32 seasons later, it’s still going strong. It originally starred William Hartnell as the Doctor – the first of eleven Doctors to date – in a serial (and episode) entitled “An Unearthly Child”. No one expected it to last this long, but then, it was the earliest days of television in the UK – no one really knew anything.
Hartnell would remain the Doctor for the first four seasons – which means that due to the BBC not keeping episodes of anything at the time, more episodes of his run are missing than any other Doctor except his immediate successor, Patrick Troughton.