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On 4 March, the following important behind-the-scenes events were known to have occurred:
- 1966 - "The Return" was recorded at Riverside Studios 1. (INFO: "The Return")
- 1967 - Episode one of The Macra Terror was recorded at Lime Grove Studios D. (TCH 10)
- 1968 - Pre-filming for Fury from the Deep continued at Ealing Studios. (TCH 12)
- 2002 - The Big Finish audio story The Sandman was recorded at the Moat Studios.
- 2005 - Big Finish's Bernice Summerfield audio story The Heart's Desire was recorded.
- 2008 - Russell T Davies began writing the script for The Next Doctor.
- 2013 - The Big Finish audio story An Ordinary Life was recorded at the Moat Studios.
- 2019 - Big Finish's audio anthology Interstitial/Feast of Fear was recorded at the Moat Studios.
- 2020 - Big Finish's audio anthology The Eighth Doctor: Time War: Volume Four was recorded at the Moat Studios.
- 2021 - Big Finish announced an audio adaptation of the unproduced TV story Mind of the Hodiac.
- 2022 - Big Finish's Master! audio anthology Nemesis Express was recorded.
- 2022 - Big Finish's The Diary of River Song audio story Friend of the Family was recorded.