20 March (releases)


 * 1965 - "The Centre" was first broadcast on BBC1.
 * 1965 - Part one of The Hijackers of Thrax was first published in TV Comic.
 * 1971 - Episode two of The Claws of Axos was first broadcast on BBC1.
 * 1971 - Part five of Gemini Plan was first published in TV Action.
 * 1976 - Part one of Treasure Trail was first published in TV Comic.
 * 1980 - The novelisation of The Stones of Blood was first published by Target Books.
 * 1980 - The Making of Doctor Who was reprinted by Target Books.
 * 1997 - Lungbarrow and The Dark Path were first published by Virgin Books.
 * 2008 - Jetsam was first published in TM 3.
 * 2013 - Issue three of Prisoners of Time was first released by IDW Publishing.