The first episode of Doctor Who (An Unearthly Child) is broadcast by the BBC, which is now the world's longest running science fiction drama.

Doctor Who is a British science fiction television series broadcast by the BBC since 1963. The series, created by Sydney Newman, C. E. Webber and Donald Wilson, depicts the adventures of an extraterrestrial being called the Doctor, part of a humanoid species called Time Lords. The Doctor travels in the universe and in time using a time travelling spaceship called the TARDIS, which externally appears as a British police box. While travelling, the Doctor works to save lives and liberate oppressed peoples by combating foes. The Doctor usually travels with companions.

An Unearthly Child is the first serial of the British science fiction television series Doctor Who. It was first broadcast on BBC TV in four weekly parts from 23 November to 14 December 1963. Scripted by Australian writer Anthony Coburn, the serial introduces William Hartnell as the First Doctor and his original companions: Carole Ann Ford as the Doctor's granddaughter, Susan Foreman, with Jacqueline Hill and William Russell as school teachers Barbara Wright and Ian Chesterton. The first episode deals with Ian and Barbara's discovery of the Doctor and his time-space ship, the TARDIS, in a junkyard in contemporary London, and the remaining episodes are set amid a power struggle between warring Stone Age factions who have lost the secret of making fire.

November 23 is the 327th day of the year in the Gregorian calendar; 38 days remain until the end of the year.