20 April (production)


 * 1964 - BBC2, the United Kingdom's third TV network, was launched. Henceforth, the main BBC network, which aired Doctor Who, would be known as BBC1.
 * 1967 - Location filming The Evil of the Daleks began at Grim's Dyke House. (TCH 10)
 * 1971 - Location filming for The Dæmons took place. (REF: Doctor Who The Handbook: The Third Doctor)
 * 1980 - Studio filming for The Leisure Hive took place at BBC Television Centre studio 3. (REF: Doctor Who The Handbook: The Fourth Doctor)
 * 1987 - Studio filming for Time and the Rani took place at BBC Television Centre Studio 8. (Doctor Who The Handbook: The Seventh Doctor)
 * 1989 - Location filming for The Curse of Fenric took place. (Doctor Who The Handbook: The Seventh Doctor)
 * 2002 - The Big Finish audio story The Rapture took place at the Moat Studios.
 * 2004 - The Big Finish audio story The Juggernauts was recorded at the Moat Studios.
 * 2010 - Big Finish's Bernice Summerfield audio story Escaping the Future was recorded.
 * 2011 - Big Finish's audio adaptation of the unproduced TV story Meltdown (retitled Power Play) was recorded at the Moat Studios.
 * 2015 - The Big Finish audiobooks The Shadows of Serenity and Prime Winner were recorded at the Moat Studios.
 * 2016 - The Big Finish audiobook The Hesitation Deviation was recorded at the Moat Studios.
 * 2018 - The Big Finish audio story Shellshock was recorded at Audio Sorcery.