21 December

Events
to be added

Behind the scenes

 * 1937 - Sheila Reid, who played Etta in DW: Vengeance on Varos, was born.
 * 1945 - Alibe Parsons (Kani in DW: Mindwarp) was born.
 * 1963 - "The Dead Planet", episode 1 of DW: The Daleks, was first broadcast.
 * 1968 - Episode 8 of DW: The Invasion was first broadcast.
 * 1982 - Edmund Bailey (the Attendant in DW: Spearhead from Space) died.
 * 1999 - Jack Le White, who went uncredited in DW: The Reign of Terror and The Daleks' Master Plan, died.
 * 1999 - John Arnatt, who played Borusa in DW: The Invasion of Time, died.
 * 1999 - Jack Le White (uncredited in DW: The Reign of Terror and DW: The Daleks' Master Plan) died.
 * 2000 - John Lee (Alydon in DW: The Daleks) died.
 * 2010 - K9TV: The Bounty Hunter was first broadcast on Five in the UK.