On 4 September, the following important behind-the-scenes events were known to have occurred:
- 1964 - The original version of "Crisis" was recorded at BBC Television Centre Studio 4. (INFO: "Crisis")
- 1967 - Location filming for The Abominable Snowmen began in Wales. (TCH 11)
- 1968 - Location filming for The Invasion continued. (TCH 13)
- 1969 - Tailor Arthur Davey made finishing touches to his 27 August Third Doctor costume.
- 1999 - Recording for The Fearmonger took place.
- 2005 - Recording for the Iris Wildthyme story Wildthyme at Large took place at The Moat Studios.
- 2012 - Recording for The Seeds of War took place at The Moat Studios.
- 2014 - Recording for The Secret History took place at the Moat Studios.
- 2017 - Recording for The Siege of Big Ben and Flight Into Hull! took place at The Moat Studios.