On 4 April, the following important behind-the-scenes events were known to have occurred:
- 1987 - Location filming for Time and the Rani took place. (Doctor Who The Handbook: The Seventh Doctor)
- 1988 - Filming for Remembrance of the Daleks caused a brief panic when a large explosion set off on a London side street during filming of a Dalek battle scene was mistaken as a possible IRA bombing.
- 1989 - Location filming for The Curse of Fenric took place. (Doctor Who The Handbook: The Seventh Doctor)
- 2005 - The BBC retracted part of its 30 March announcement of the departure of Christopher Eccleston, indicating it released the information with incorrect attribution and without the actor's consent.
- 2016 - Filming began on the Class story For Tonight We Might Die.
- 2017 - The Big Finish audio story The Blood Furnace was recorded at the Moat Studios.
- 2018 - The Big Finish audio story Warlock's Cross was recorded at the Moat Studios.