On 31 May, a number of things set in or relevant to the Doctor Who universe were released or published.
- 1965 - Part five of the TV Comic story The Gyros Injustice was first published.
- 1969 - Episode seven of The War Games was first broadcast on BBC1.
- 1969 - Part one of the TV Comic story Operation Wurlitzer was first published.
- 1975 - Part two of the TV Comic story The Wreckers was first published.
- 2005 - The graphic novel The Tides of Time was first published by Panini Books.
- 2006 - The Doctor Who Adventures comic story Warfreekz! was first published.
- 2008 - Silence in the Library was first broadcast on BBC One. Later, Shadow Play aired on BBC Three.
- 2012 - The Doctor Who Adventures comic story The Mirror War was first published.
- 2013 - JN-T: The Life and Scandalous Times of John Nathan-Turner was first published by Miwk Publishing.
- 2016 - This Sporting Life was first released by Big Finish Productions.
- 2017 - Part one of Secret Agent Man was first published in 9DO 13.