21 April

Events
to be added

Behind the scenes

 * 1906 - Aimée Delamain, who played Doña Arana in TV: The Two Doctors, was born.
 * 1927 - Gerald Flood (King John in TV: The King's Demons and Kamelion) was born.
 * 1973 - Episode 3 of TV: Planet of the Daleks was first broadcast.
 * 1977 - Doctor Who and the Claws of Axos was released in paperback by Target Books.
 * 2002 - Terry Walsh, a fight arranger, stunt arranger and stuntman for Doctor Who, died.
 * 2007 - TV: Daleks in Manhattan was first broadcast.
 * 2008 - AUDIO: The Destroyer of Delights began recording.