20 September (releases)


 * 1969 - Part three of TV Comic story The Brotherhood was first published.
 * 1975 - Part four of Terror of the Zygons was first broadcast on BBC1.
 * 1975 - Part two of TV Comic story The Sinister Sea was first published.
 * 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 - Doctor Who: Battles in Time comic story Growing Terror was first published in its very first issue.
 * 2012 - Doctor Who Adventures comic story Dawn of Time! was first published.