21 October (releases)


 * 1967 - Episode four of The Abominable Snowmen was first broadcast on BBC1.
 * 1978 - Part four of The Pirate Planet was first broadcast on BBC1.
 * 1989 - Part two of Hunger from the Ends of Time was first published in The Incredible Hulk Presents.
 * 2010 - Hell House was first published in TM 24.