14 December (production)

On 14 December, the following important behind-the-scenes events were known to have occurred:
 * 1966 - Pre-filming for The Underwater Menace began at Ealing Studios. (TCH 9)
 * 1971 - Studio filming for The Sea Devils took place at BBC Television Centre studio 8. (REF: Doctor Who The Handbook: The Third Doctor)
 * 1977 - OB filming for The Invasion of Time took place. (REF: Doctor Who The Handbook: The Fourth Doctor)
 * 2003 - Big Finish's Bernice Summerfield audio story Death and the Daleks was recorded.
 * 2007 - Recording for The Haunting of Thomas Brewster took place.
 * 2010 - Recording for Kiss of Death took place.
 * 2021 - Big Finish's audio anthology Stranded 4 was recorded at PRL Studios.
 * 2021 - Big Finish's Master! audio anthology Nemesis Express was recorded.