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On 5月18日, the following important behind-the-scenes events were known to have occurred:
- 1982 - Studio filming for Arc of Infinity took place at BBC Television Centre studio 1. (REF: Doctor Who The Handbook: The Fifth Doctor)
- 1988 - Location filming for The Greatest Show in the Galaxy took place. (Doctor Who The Handbook: The Seventh Doctor)
- 1990 - Location filming for Search Out Space took place. (Doctor Who The Handbook: The Seventh Doctor)
- 2000 - The Big Finish audio story Storm Warning was recorded at the Moat Studios.
- 2010 - The Big Finish audio story The Sentinels of the New Dawn was recorded at the Moat Studios.
- 2013 - The commissioning of series 8 was formally announced on the Doctor Who website.
- 2016 - Big Finish's Torchwood - Special Releases audio story Outbreak was recorded.
- 2020 - Big Finish's Gallifrey audio anthology Time War: Volume Four was recorded.
- 2020 - Big Finish announced an audio adaptation of the unproduced Doctor Who story The Doomsday Contract.
- 2022 - Big Finish announced the return of Seán Carlsen as Narvin for the Gallifrey audio series War Room.