The Tenth Planet of malevolent cyborgs that became a recurring adversary in later "Doctor Who" stories. The "tenth planet" in the title makes reference to a fictional lost planet in Earth's Solar System; at the time of production, the Solar System was generally held to consist of nine planets, prior to the redesignation of Pluto as a minor planet. "The Tenth Planet" is an incomplete "Doctor Who" serial – one of many serials that were affected by the BBC's policy of wiping archived programmes in the 1960s and 70s. Only three of the four episodes are currently held in the BBC archives; the
Gustav Holst he and other younger English composers had adopted Holst's economy of style: "With what enthusiasm did we pare down our music to the very bone". Short cites other English composers who are in debt to Holst, in particular William Walton and Benjamin Britten, and suggests that Holst's influence may have been felt further afield. Above all, Short recognises Holst as a composer for the people, who believed it was a composer's duty to provide music for practical purposes—festivals, celebrations, ceremonies, Christmas carols or simple hymn tunes. Thus, says Short, "many people who may never have heard any of [Holst's] major