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
The Magical Music Box which accompanied the stories" 1. Journey to the Stars - The Planets by Gustav Holst 2. Hall of the Troll King - Peer Gynt Suites by Edvard Grieg 3. Sky Racers - Beethoven's Pastoral Symphony 4. The Wizard's Spell - Swan Lake by Tchaikovsky 5. House of Terrors - Symphonie Fantastique by Berlioz 6. Daylight Robbery - Rhapsody in Blue by George Gershwin 7. The River God - Ravel's Bolero 8. Night of the Aliens - Bach's Orchestral Suite No 4 9. The Bull Fights Back - Bizet's Carmen Suites 1 and 2 10. Animal Rescue - Carnival of the