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On 3月22日, the following important behind-the-scenes events were known to have occurred:
- 1968 - Pre-filming for The Wheel in Space concluded at Ealing Studios. (TCH 12)
- 1979 - Pre-filming for The Creature from the Pit took place at Ealing Studios. (REF: Doctor Who The Handbook: The Fourth Doctor)
- 2003 - The Big Finish audio story Creatures of Beauty was recorded at the Moat Studios.
- 2005 - Big Finish's Bernice Summerfield audio story The Kingdom of the Blind was recorded.
- 2007 - Kylie Minogue, via her management, expressed interest in appearing in an episode of Doctor Who.
- 2018 - Big Finish's audio anthology The Eighth Doctor: Time War: Volume Two was recorded.
- 2019 - Big Finish's audio anthology The Eighth Doctor: Time War: Volume Three was recorded.
- 2021 - Big Finish's audio anthology The Third Doctor Adventures: Volume Eight was recorded.
- 2022 - Big Finish's audio anthology Beyond War Games was recorded.