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 wrath. In 1912 Holst composed two psalm settings, in which he experimented with plainsong; the same year saw the enduringly popular "St Paul's Suite" (a "gay but retrogressive" piece according to Dickinson), and the failure of his large scale orchestral work "Phantastes". Holst conceived the idea of "The Planets" in 1913, partly as a result of his interest in astrology, and also from his determination, despite the failure of "Phantastes", to produce a large-scale orchestral work. The chosen format may have been influenced by Schoenberg's "Fünf Orchesterstücke", and shares something of the aesthetic, Matthews suggests, of Debussy's "Nocturnes" or "La