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On 18 October, the following important behind-the-scenes events were known to have occurred:
- 1963 - Studio filming for the very first Doctor Who episode took place at Lime Grove Studio D.
- 1963 - Verity Lambert decided that designer Peter Brachacki was unsuitable for Doctor Who, and demanded a replacement. Barry Newbery and Raymond Cusick were considered, and got to work. Newbery's plans, however, were too costly for Donald Baverstock, who sent a memo to Donald Wilson in complaint.
- 1963 - Director Christopher Barry received the first attempts at the Dalek voices from J. N. Shearme. Two different approaches arrived through Barry's letterbox: one using computer synthesis and the other using a vocoder. Barry indicated he was particularly interested in the vocoder approach, but no final decision was taken on this day.
- 1968 - Episode five of The Invasion was recorded at Lime Grove Studios D. (TCH 13)
- 1971 - Studio filming for Day of the Daleks took place at BBC Television Centre studio 8. (REF: Doctor Who The Handbook: The Third Doctor)
- 1977 - Studio filming for Underworld took place. (REF: Doctor Who The Handbook: The Fourth Doctor)
- 1979 - Location filming for Shada took place. (REF: Doctor Who The Handbook: The Fourth Doctor)
- 2012 - The Big Finish audio story Ghost in the Machine was recorded at the Moat Studios.
- 2014 - Big Finish announced the casting of Miranda Raison as the Sixth Doctor's companion Constance Clarke.
- 2017 - The Big Finish audio story Landbound was recorded at Ladbroke Audio.
- 2018 - Big Finish's audio anthology The Eighth of March was recorded at the Moat Studios.
- 2021 - Big Finish's Torchwood audio story Infidel Places was recorded at PRL Studios.
- 2021 - Big Finish's audio anthology Shades of Fear was recorded at the Soundhouse.