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On 22 October, the following important behind-the-scenes events were known to have occurred:
- 1963 - Donald Baverstock's 18 October memo concerning production costs was considered, and it was decided to produce thirteen episodes with a budget of £2,500 each.
- 1965 - "The Nightmare Begins" was recorded at BBC Television Centre 3. (TCH 6)
- 1966 - Episode one of The Power of the Daleks was recorded at Riverside Studios 1. (TCH 9)
- 1969 - Location filming for Spearhead from Space took place. (REF: Doctor Who The Handbook: The Third Doctor)
- 1971 - Location filming for The Sea Devils took place. (REF: Doctor Who The Handbook: The Third Doctor)
- 1979 - Pre-filming for Shada took place at Ealing Studios. (REF: Doctor Who The Handbook: The Fourth Doctor)
- 1984 - Location filming for The Mark of the Rani took place. (REF: Doctor Who The Handbook: The Sixth Doctor)
- 2008 - The Big Finish audio story The Cannibalists was recorded at the Moat Studios.
- 2012 - The second series of Big Finish's Doctor Who spin-off Counter-Measures was recorded at the Moat Studios.
- 2014 - Big Finish's audio anthology The Third Doctor Adventures was recorded at the Moat Studios.
- 2015 - The Big Finish audio story Death and the Queen was recorded at the Moat Studios.
- 2016 - Big Finish confirmed the thirteenth series of Jago & Litefoot.
- 2017 - Bradley Walsh, Tosin Cole and Mandip Gill were officially announced as new companions Graham O'Brien, Ryan Sinclair and Yasmin Khan.
- 2018
- Big Finish's The Paternoster Gang audio anthology Heritage 1 was recorded at the Soundhouse.
- Big Finish announced that Jon Culshaw had been cast as Brigadier Lethbridge-Stewart, recreating the role originated by Nicholas Courtney.
- 2020 - Big Finish's audio anthology The Third Doctor Adventures: Volume Seven was recorded.
- 2021 - Big Finish's audio anthology Blood & Steel was recorded at the Soundhouse.
- 2022 - Big Finish announced the Class: The Audio Adventures audio story Secret Diary of a Rhodian Prince.