21 April

Behind the scenes

 * 1906 - Actress Aimée Delamain was born.
 * 1927 - Actor Gerald Flood was born.
 * 1973 - Episode three of Planet of the Daleks was first broadcast on BBC1.
 * 1977 - Doctor Who and the Claws of Axos was released in paperback by Target Books.
 * 2002 - Fight arranger Terry Walsh died.
 * 2007 - Daleks in Manhattan was first broadcast on BBC One. Later, CON: A New York Story aired on BBC Three.
 * 2008 - Big Finish audio story The Destroyer of Delights began recording.