On 31 October, a number of things set in or relevant to the Doctor Who universe were released or published.
- 1964 - "Planet of Giants" was first broadcast on BBC1, beginning season 2 of Doctor Who.
- 1970 - Part one of the TV Comic story Trial of Fire was first published.
- 1985 - Timeview was first published by Who Dares Publishing.
- 1991 - DWM 180 was first released by Marvel Comics.
- 2003 - The audio stories Master and The Wormery were first released by Big Finish Productions.
- 2007 - The Doctor Who: Battles in Time comic story House Pests was first published.
- 2008 - The Diet of Worms was first released by Big Finish.
- 2008 - Sisters of the Flame was broadcast on BBC Radio 7.
- 2009 - Regeneration was first broadcast on Disney XD, beginning the K9 series.
- 2010 - The Invasion of E-Space was first released by Big Finish.
- 2011 - The Gunpowder Plot was first released by BBC Wales Interactive.
- 2011 - The Blu-ray box set The Sarah Jane Adventures: The Complete Fourth Series was released in the UK.
- 2012 - DWDVDF 100 was first published by GE Fabbri Ltd.
- 2014 - The Widow's Assassin was first released by Big Finish.
- 2015 - The Blood of Azrael was released as a graphic novel by Panini Comics.
- 2015 - The Zygon Invasion was first broadcast on BBC One.
- 2017 - The Ultimate Foe was first published by Obverse Books.
- 2018 - TCH 16 was first released by Hachette Partworks.
- 2019 - DWFC 162 was first released by Eaglemoss Collections.
- 2021 - The Halloween Apocalypse was first broadcast on BBC One, launching Doctor Who: Flux.