20 November (releases)


 * 1965 - "Day of Armageddon" was first broadcast on BBC1.
 * 1965 - Part four of Enter: The Go-Ray was published in TV Comic.
 * 1971 - Part one of The Eternal Present was first published in Countdown.
 * 1975 - The novelisation of The Three Doctors was first published by Target Books.
 * 1976 - Part four of The Deadly Assassin was first broadcast on BBC1.