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)
 * 1987 - Studio filming for Time and the Rani took place at BBC Television Centre Studio 8. (Doctor Who The Handbook: The Seventh Doctor)
 * 2002 - Recording for The Rapture took place at The Moat Studios.
 * 2004 - Recording for The Juggernauts took place at The Moat Studios.
 * 2010 - Recording for Escaping the Future took place.
 * 2011 - Recording for Power Play took place at The Moat Studios.
 * 2015 - Recording for The Shadows of Serenity and Prime Winner took place at The Moat Studios.
 * 2016 - Recording for The Hesitation Deviation took place at The Moat Studios.