18 January (releases)

* 1964 - "The Expedition", the fifth episode of The Daleks, was first broadcast on BBC tv.
* 1965 - Part one of the story The Therovian Quest was first published in the 684th issue of TV Comic.
* 1969 - Episode four of The Krotons was first broadcast on BBC1.
* 1969 - Part three of the TV Comic story Father Time was first published.
* 1975 - Part four of Robot was first broadcast on BBC1.
* 1975 - Part two of the TV Comic story Death Flower was first published.
* 1979 - The novelisation of The Hand of Fear was first released by Target Books.
* 1982 - Part one of Four to Doomsday was first broadcast on BBC1.
* 1983 - Part one of Snakedance was first broadcast on BBC1.
* 1990 - The novelisation of Planet of Giants was first released by Target Books. With this release, all serials of the First Doctor era were now novelised.
* 1996 - Just War and the novelisation of Downtime were first published by Virgin Books.
* 1996 - DWM 235 was first released by Marvel Comics.
* 1997 - Part three of the Radio Times comic story Perceptions was first published.
* 2010 - The DVD box set Peladon Tales was first released in Region 2.
* 2012 - Part three of K9's Question Time was first broadcast on BBC Two.
* 2016 - Into the Unknown, the first Erimem anthology, was first published by Thebes Publishing.
* 2016 - The Torchwood audio story Uncanny Valley was released by Big Finish Productions.
* 2016 - Toby Hadoke's Who's Round 154 was released online.
* 2017 - Part one of Slaver's Song was first published in 9DO 9.
* 2018 - The Sons of Kaldor, The Crowmarsh Experiment, The Mind Runners and The Demon Rises were first released by Big Finish.
* 2018 - Doctor Who and the Krikkitmen was first published by BBC Books.
* 2023 - Cass was first released by Big Finish.
* 2024 - The Torchwood audio story Poppet was released by Big Finish.