On 18 May, a number of things set in or relevant to the Doctor Who universe were released or published.
- 1968 - Episode four of The Wheel in Space was first broadcast on BBC1.
- 1968 - Part four of the TV Comic story The Dyrons was first published.
- 1974 - Episode three of Planet of the Spiders was first broadcast on BBC1.
- 1974 - Part one of the TV Comic story Size Control was first published.
- 1978 - The novelisation of The Tomb of the Cybermen was released by Target Books.
- 1989 - The Nightmare Fair was first published by Target Books.
- 1995 - The Menagerie and Human Nature was first published by Virgin Books.
- 1995 - The Discontinuity Guide was first published by Doctor Who Books.
- 1998 - The Mind of Evil was released on VHS.
- 2006 - I Am a Dalek was first published by BBC Books.
- 2006 - TDW 6 aired on CBBC.
- 2011 - DWDVDF 62 was first published by GE Fabbri Ltd.
- 2013 - The Name of the Doctor was first broadcast on BBC One.
- 2013 - Strax Field Report: A Glorious Day was released online.
- 2017 - A Brief History of Time Lords was first published by BBC Books.
- 2017 - The graphic novel Emperor of the Daleks was first published by Panini Comics.
- 2017 - The Dangerous Book of Monsters was first published by Penguin Group.