An Unearthly Child (also known as 100,000 BC, among other titles) is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 23 November to 14 December 1963. It is the first serial of the series and introduces William Hartnell as the First Doctor, Carole Ann Ford as Susan Foreman, Jacqueline Hill as Barbara Wright and William Russell as Ian Chesterton.
The first episode deals with Ian's and Barbara's discovery of the Doctor and his spaceship, the "TARDIS", in a junkyard in contemparary London. The remaining episodes are set in 100,000BC, amongst a power struggle between warring Stone Age factions.