20 October (releases)


 * 1973 - Part two of the TV Comic story Nova was first published.
 * 1977 - The novelisation of The Deadly Assassin was released by Target Books.
 * 1979 - Part four of City of Death was first broadcast on BBC1.
 * 1980 - The anthology The Adventures of K9 was first published by Sparrow Books.
 * 1983 - The novelisation of Arc of Infinity was first released by Target Books.
 * 1988 - The novelisation of The Edge of Destruction was first released by Target Books.
 * 1994 - St Anthony's Fire and Venusian Lullaby were first published by Virgin Books.
 * 2003 - Invasion of the Dinosaurs was released on VHS.
 * 2007 - The Target Book was first published by Telos Publishing.
 * 2008 - Part one of Secrets of the Stars was first broadcast on CBBC.
 * 2010 - DWDVDF 47 was first published by GE Fabbri Ltd.
 * 2011 - DWA 240 was first released by BBC Magazines.
 * 2011 - DWM 440 was first released by Panini Comics.
 * 2016 - For Tonight We Might Die was first shown at the Class World Premiere in Shoreditch.
 * 2016 - DWM 505 was first released by Panini Comics.
 * 2016 - DWFC 83 was first released by Eaglemoss Collections.
 * 2020 - The Torchwood audio story The Three Monkeys was first released by Big Finish Productions.