6 August (production)


 * 1965 - "Mission to the Unknown" was recorded at BBC Television Centre Studio 4. (TCH 6)
 * 1966 - The BBC announced to the press that William Hartnell was to leave the role of the first Doctor. Patrick Troughton signed a contract to play the second Doctor for 22 episodes.
 * 1998 - Recording for Beyond the Sun took place.
 * 2000 - Recording for The Holy Terror took place at The Moat Studios.
 * 2004 - Recording for the UNIT story Snake Head took place at The Moat Studios.
 * 2010 - Recording for The Demons of Red Lodge and Other Stories took place at The Moat Studios.
 * 2016 - Recording for The Haunting took place at The Moat Studios.
 * 2018 - Recording for The Planet of Witches took place.
 * 2020 - Big Finish announced the multi-Doctor Time Lord Victorious story Echoes of Extinction.