This article about a day of the year is currently under construction. It's likely to be a bit messy.
On 13 September, the following important behind-the-scenes events were known to have occurred:
- 1968 - Location filming for The Invasion concluded. Pre-filming for the story also took place at Ealing Studios on this day. (TCH 13)
- 1969 - Filming began on Spearhead from Space. These were the first scenes shot in colour, as well as the first starring Jon Pertwee as the Third Doctor.
- 2008 - Recording for Hothouse took place at The Moat Studios.
- 2010 - Recording for The Cold Equations took place at The Moat Studios.
- 2011 - Recording for The Wrath of the Iceni took place at The Moat Studios.
- 2012 - Recording for The Apocalypse Mirror took place at The Moat Studios.
- 2013 - Recording for The English Way of Death took place at The Moat Studios.
- 2019 - Recording for Stranded 1 took place.