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On 1月20日, the following important behind-the-scenes events were known to have occurred:
- 1967 - Model filming for The Moonbase took place at Stage 3 of Ealing Studios. (TCH 9)
- 1968 - Episode two of The Web of Fear was recorded at Lime Grove Studios D. (TCH 11)
- 1982 - Studio filming for Time-Flight took place at BBC Television Centre studio 8. (REF: Doctor Who The Handbook: The Fifth Doctor)
- 2001 - The Big Finish audio story Seasons of Fear was recorded in Bristol.
- 2004 - The Big Finish audio story The Roof of the World was recorded at the Moat Studios.
- 2006 - Rehearsals for The Idiot's Lantern were held. (DWMSE 14)
- 2012 - The Big Finish audio story The Butcher of Brisbane was recorded at the Moat Studios. A prequel to The Talons of Weng-Chiang, the casting of Angus Wright as the younger, pre-disfigured Magnus Greel was announced on the Big Finish website.
- 2017 - The Big Finish audio story Time in Office was recorded at the Moat Studios.
- 2020 - Big Finish's audio anthology The Lost Resort and Other Stories was recorded at the Moat Studios.
- 2022 - The upcoming release of The Collection: Season 22 was announced.