20 September (releases)


 * 1975 - Part four of Terror of the Zygons was first broadcast on BBC1.
 * 1980 - Part four of The Leisure Hive was first broadcast on BBC1.
 * 1986 - Part three of The Mysterious Planet was first broadcast on BBC1.
 * 1989 - Part three of Battlefield was first broadcast on BBC1.
 * 2006 - Growing Terror was first published in the very first issue of  Battles in Time.