20 January (releases)


 * 1968 - Episode five of The Enemy of the World was first broadcast on BBC1.
 * 1968 - Part four of TV Comic story The Witches was first published.
 * 1973 - Episode four of The Three Doctors was first broadcast on BBC1.
 * 1973 - Part one of Deadly Choice was first published in TV Action.
 * 1977 - The novelisation of Carnival of Monsters was first published by Target Books.
 * 1979 - Part one of The Armageddon Factor was first broadcast on BBC1.
 * 1979 - Part six of TV Comic story The Metal-Eaters was reprinted as a Fourth Doctor story.
 * 1996 - Episode one of The Ghosts of N-Space was first broadcast on BBC Radio.
 * 1984 - Part two of The Awakening was first broadcast on BBC1.
 * 1994 - Conundrum was first published by Virgin Books.
 * 1996 - Episode one of radio drama The Ghosts of N-Space was first broadcast on BBC Radio.
 * 2011 - Doctor Who Adventures comic story Rory's Story was first published.