20 May (releases)


 * 1967 - Episode one of The Evil of the Daleks was first broadcast on BBC1.
 * 1967 - Part three of the TV Comic story The Exterminator was first published.
 * 1972 - Episode one of The Time Monster was first broadcast on BBC1.
 * 1972 - Part four of the TV Action comic story A Stitch in Time was first published.
 * 1976 - The novelisation of Revenge of the Cybermen was released by Target Books.
 * 1978 - Part seven of the TV Comic story Guardian of the Tomb was first published.
 * 1982 - The novelisation of The Keeper of Traken was first released by Target Books.
 * 1993 - Lucifer Rising was first published by Virgin Books.
 * 2002 - The Ambassadors of Death was released on VHS.
 * 2006 - The Age of Steel was first broadcast on BBC One. Later, From Zero to Hero aired on BBC Three. Also, Tardisode 7 was released online.
 * 2009 - The anthology Iris Wildthyme and the Celestial Omnibus was first published by Obverse Books.
 * 2009 - DWDVDF 10 was first published by GE Fabbri Ltd.
 * 2010 - The Doctor Who Adventures comic story Track Attack was first published.
 * 2013 - The box set Doctor Who: Series 7, Part 2 was released in the UK.
 * 2015 - The first part of Titan Comics' comic story Conversion and the stand-alone strip Bow-ties for Goal Posts was first published in 11D 12
 * 2015 - Last of the Cybermen was first released by Big Finish.
 * 2016 - Toby Hadoke's Who's Round 170 was released online.
 * 2017 - Extremis was first broadcast on BBC One.
 * 2020 - The Torchwood audio story Iceberg was first released by Big Finish.
 * 2020 - Listen was first released online.
 * 2020 - The audio reading of Scorched Earth was first released on Doctor Who's YouTube channel.