Doctor Who first went out on BBC television on 23 November 1963 — the day after the assassination of John F. Kennedy, which so dominated the news that the first episode was repeated the following week because so few people had watched it. It has since become the longest-running science fiction series in the world.
The premise
The Doctor is an alien, a Time Lord from the planet Gallifrey, who travels through space and time in a ship called the TARDIS — Time And Relative Dimension In Space. It is famously bigger on the inside, and it is stuck in the shape of a 1960s British police telephone box because its disguise mechanism broke in an early episode and was never fixed.
That detail is the reason a piece of obsolete British street furniture is now recognised worldwide. Actual police boxes had all but vanished by the 1970s; the BBC ended up trademarking the design.
Regeneration
The device that made the show immortal, and it was invented out of necessity. By 1966 William Hartnell, the original lead, was too ill to continue. Rather than end the series, the production team decided a Time Lord facing death could renew his body entirely — becoming a different person, played by a different actor, with the same memories.
Fifteen actors have now played the part. Each brings a distinct personality, and arguing about which is best is a lifelong British pastime. Jodie Whittaker became the first woman in the role in 2017; Ncuti Gatwa the first Black actor to lead the series in 2023.
The Daleks
The Doctor’s greatest enemies appeared in the second serial and made the show a hit. They are mutated creatures inside armoured casings, they shriek “EXTERMINATE!”, and their inability to climb stairs was a national joke for decades until the production finally let them fly.
Terry Nation created them; the BBC’s in-house designer Raymond Cusick gave them their shape, reportedly inspired by a pepper pot. “Dalekmania” in the mid-1960s was a genuine merchandising craze.
Off the air and back
The BBC cancelled the series in 1989 after ratings decline and open institutional indifference. Apart from an unsuccessful 1996 television film, it stayed off screen for sixteen years, surviving in novels, audio dramas and an unusually devoted fan culture.
Russell T Davies brought it back in 2005 with a bigger budget and a modern emotional register, and it was an immediate and enormous success. It has run continuously since, and is now co-produced with Disney for international distribution.
Behind the sofa
The phrase is a British idiom largely because of this programme. Generations of children watched from behind the furniture during frightening scenes, and being scared by Doctor Who at a formative age is a shared national memory — the show has always sat exactly on the line of what a family audience will tolerate, quite deliberately.