20 August (production)

* 1963 - Filming for Doctor Who began. In the initial session, the title sequence was created by Bernard Lodge. He pointed a camera at the camera's monitor screen, which created the pattern of feedback, or what is known as "the howl-around effect". Lodge later recalled that his work on this day was inspired by the work of Ben Palmer, who had done something similar on .
* 1977 - Studio filming for Image of the Fendahl took place at BBC Television Centre studio 6. (REF: Doctor Who The Handbook: The Fourth Doctor)
* 1978 - Location filming for The Power of Kroll took place. (REF: Doctor Who The Handbook: The Fourth Doctor)
* 2007 - The Big Finish audio story Sisters of the Flame was recorded at the Moat Studios.
* 2009 - Big Finish's audio story Deimos / The Resurrection of Mars was recorded at the Moat Studios.
* 2014 - Big Finish's audio adaptation of the novel The Well-Mannered War was recorded at Audio Sorcery.
* 2015 - Big Finish's Torchwood audio story Uncanny Valley was recorded at Ladbroke Audio.
* 2018 - Big Finish's audio drama anthology The Eighth Doctor: The Further Adventures of Lucie Miller: Volume One was recorded at the Moat Studios.
* 2018 - Big Finish announced a special audio box set, The Legacy of Time, to commemorate the twentieth anniversary of Big Finish's Doctor Who audio adventures.
* 2019 - Big Finish's audio anthology Blood on Santa's Claw and Other Stories was recorded at the Soundhouse.
* 2019 - Big Finish announced the audio box set The Sixth Doctor and Peri: Volume One.