21 May

Events
to be added

Behind the scenes

 * 1932 - Jay Neill (a Pikeman in DW: The Masque of Mandragora, Silvey in The Invisible Enemy and Klimt in Underworld) was born.
 * 1953 - Trevor Cooper, who played Takis in DW: Revelation of the Daleks, was born in London.
 * 1966 - "The OK Corral,", Episode 4 of DW: The Gunfighters, was first broadcast.
 * 1995 - Peter Rutherford (Roth in DW: The Sontaran Experiment) died.
 * 2005 - DW: The Empty Child was first broadcast.
 * 2011 - DW: The Rebel Flesh was first broadcast.
 * Bill Hunter (one of the Guardians in DW: The Ark) died.