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On 4月29日, the following important behind-the-scenes events were known to have occurred:
- 1966 - "Johnny Ringo" was recorded at Riverside Studios 1. (TCH 7)
- 1966 - Location filming for The Savages began at Shire Lane Quarry. (TCH 8)
- 1967 - Episode five of The Faceless Ones was recorded at Lime Grove Studios D. (TCH 10)
- 1968 - Location filming for The Dominators continued at Gerrards Cross. (TCH 12)
- 1971 - Location filming for The Dæmons took place. (REF: Doctor Who The Handbook: The Third Doctor)
- 1973 - Studio filming for The Green Death took place at BBC Television Centre studio 3. (REF: Doctor Who The Handbook: The Third Doctor)
- 1974 - Location filming for Robot took place. (REF: Doctor Who The Handbook: The Fourth Doctor)
- 1975 - Location filming for Pyramids of Mars took place. (REF: Doctor Who The Handbook: The Fourth Doctor)
- 1981 - Studio filming for Four to Doomsday took place at BBC Television Centre studio 6. (REF: Doctor Who The Handbook: The Fifth Doctor)
- 1988 - Studio filming for Remembrance of the Daleks took place at BBC Television Centre Studio 8. (Doctor Who The Handbook: The Seventh Doctor)
- 2001 - The Big Finish audio story The One Doctor was recorded at the Moat Studios.
- 2005 - The Big Finish audio story Other Lives was recorded at the Moat Studios.
- 2009 - Big Finish's audio adaptation of the unmade TV story Leviathan was recorded at the Moat Studios.
- 2010 - The Big Finish audio story A Death in the Family was recorded at the Moat Studios.
- 2015 - The Big Finish audio story The Forsaken was recorded at the Moat Studios.
- 2015 - Read-through for The Zygon Invasion took place.
- 2020 - Big Finish announced the upcoming release of their lockdown-recorded Doctor Who audio adventure Shadow of the Sun.
- 2021 - Big Finish's audio anthologies The Third Doctor Adventures: Volume Eight and Torchwood Soho: Ashenden were recorded.
- 2021 - Big Finish announced The Audio Novels audiobook Watchers.