On 19 September, the following important behind-the-scenes events were known to have occurred:
- 1963 - The first filming session for the very first Doctor Who story, An Unearthly Child, took place. It was a one-day shoot at Ealing Studios of the last few seconds of episode one, depicting a caveman casting his shadow over the Doctor's TARDIS.
- 2011 - Episode two of The Underwater Menace was recovered.
- 2012 - Recording of the sixth series of Gallifrey began at The Moat Studios.
- 2017 - Recording for Torchwood One: Machines took place at The Soundhouse.
- 2019 - Recording for The First Doctor Adventures: Volume Four took place at the Soundhouse.