Editing Logopolis (section)

===Filming===
[[File:Jodrell Bank (4736511224).jpg|thumb|The BBC was unable to film on location at [[Jodrell Bank Observatory|Jodrell Bank]], and a scale model was used instead. Drone shots of the telescope were included in the 2019 Blu-Ray DVD release]]
For the outdoor scenes in Part One, in which Doctor materialises the TARDIS next to an actual [[police box]] on Earth, the production team had initially planned to [[Location shooting|film on location]] in a [[layby]] on the [[A1 in London|Barnet Bypass]], in the outskirts of [[North London]]. By the 1980s, police boxes had been obsolete for many years, but one of the last surviving boxes in Britain was still standing here, and it was intended to film the TARDIS prop standing next to the real police box. However, shortly before filming was due to take place, the production team discovered that the Barnet police box had been vandalised and subsequently demolished. Filming was re-located to a layby on the southbound side of the [[A413 road|A413]] [[Amersham]] Road near [[Denham, Buckinghamshire]]. An older TARDIS prop which had last been used in [[Doctor Who season 17|season 17]] was brought out of storage and assembled on location to stand in for the real police box. Today, the [[M25 motorway|M25]] bridges the road where the scene was filmed.<ref>{{cite web |title=BBC - The Fourth Dimension: Logopolis |url=https://www.bbc.co.uk/programmes/articles/1v9MWZyM2QD2hLbwHT6LBCb/the-fourth-dimension |website=bbc.co.uk |publisher=BBC |access-date=17 January 2025 |archive-url=https://web.archive.org/web/20170316002822/https://www.bbc.co.uk/programmes/articles/1v9MWZyM2QD2hLbwHT6LBCb/the-fourth-dimension |archive-date=16 March 2017|url-status=live}}</ref>{{sfn|Burk|Smith|2013|p=213}}

It had originally been intended to film the outdoor Pharos Project scenes in Part Four on location at the [[Jodrell Bank Observatory|Jodrell Bank]] [[Lovell Telescope]] in Cheshire, but this was precluded by budgetary constraints. Instead the exterior scenes were filmed at the BBC's receiving station in [[Crowsley Park]], and [[miniature effect]] shots were created using a [[scale model]] of a radio telescope. The scenes in the structure of the telescope were shot on [[Stage lighting|lighting gantry]] in the [[Top of the Pops]] studio at [[Television Centre, London]].{{sfn|Anghelides|Richards|1994|p=6}}<ref name="bbcstudios-blu-ray">{{cite web |title=Press Releases: Revisit Everyone’s Favorite Classic Era Doctor In Doctor Who: Tom Baker Complete Season Seven For The First Time On Blu-ray March 19, 2019 |url=https://www.bbcstudiospressroom.com/press/revisit-everyones-favorite-classic-era-doctor-in-doctor-who-tom-baker-complete-season-seven-for-the-first-time-on-blu-ray-march-19-2019/ |website=www.bbcstudiospressroom.com |publisher=BBC Studios |access-date=12 January 2025 |archive-url=https://web.archive.org/web/20240909123341/https://www.bbcstudiospressroom.com/press/revisit-everyones-favorite-classic-era-doctor-in-doctor-who-tom-baker-complete-season-seven-for-the-first-time-on-blu-ray-march-19-2019/ |archive-date=9 September 2024 |date=19 March 2019 |url-status=live}}</ref><ref name="uom-jodrell">{{cite web |title=When Doctor Who came to Jodrell (and UoM’s other sci-fi hits) |url=https://www.mub.eps.manchester.ac.uk/science-engineering/2018/12/12/when-doctor-who-came-to-jodrell-and-uoms-other-sci-fi-hits/ |website=Science and Engineering |publisher=[[University of Manchester]] |access-date=12 January 2025 |archive-url=https://web.archive.org/web/20220524083000/https://www.mub.eps.manchester.ac.uk/science-engineering/2018/12/12/when-doctor-who-came-to-jodrell-and-uoms-other-sci-fi-hits/ |archive-date=24 May 2022 |date=12 December 2018 |url-status=live}}</ref>{{sfn|Anghelides|Richards|1994|p=6}}

Incidental music in the serial was composed by [[Paddy Kingsland]], and includes [[leitmotif]]s for Logopolis and the Watcher. In Part Four, an excerpt from [[Symphony No. 8 (Schubert)|Symphony No. 8]] by [[Franz Schubert]] is heard playing on the technician's headphones  in the Pharos Project control room.{{sfn|Anghelides|Richards|1994|p=18}}<ref name="pac">{{cite web |title=Dr. Who Programme-As-Completed |url=https://www.bbc.co.uk/doctorwho/classic/episodeguide/pasb/logopolis.pdf |publisher=BBC |archive-url=https://web.archive.org/web/20150208015638/https://www.bbc.co.uk/doctorwho/classic/episodeguide/pasb/logopolis.pdf |archive-date=8 February 2015 |date=28 February 1981 |url-status=live}}</ref>