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On 12月19日, the following important behind-the-scenes events were known to have occurred:
- 1968 - Location filming for The Seeds of Death took place at Hampstead Heath. (TCH 14)
- 1973 - Studio filming for Death to the Daleks took place at BBC Television Centre studio 3. (REF: Doctor Who The Handbook: The Third Doctor)
- 1980 - Location filming for Logopolis took place. (REF: Doctor Who The Handbook: The Fourth Doctor)
- 1984 - Studio filming for Timelash took place. (REF: Doctor Who The Handbook: The Sixth Doctor)
- 2002 - Recording for Nekromanteia took place at The Moat Studios.
- 2008 - Recording for Venus Mantrap took place.
- 2017 - Big Finish's audio anthology Ravenous 1 was recorded at the Moat Studios.