21 December

Events
to be added

Behind the scenes

 * 1937 - Sheila Reid, who played Etta in TV: Vengeance on Varos, was born.
 * 1945 - Alibe Parsons (Kani in TV: Mindwarp) was born.
 * 1963 - "The Dead Planet", episode 1 of TV: The Daleks, was first broadcast.
 * 1968 - Episode 8 of TV: The Invasion was first broadcast.
 * 1982 - Edmund Bailey (the Attendant in TV: Spearhead from Space) died.
 * 1989 - Edmund Warwick, who played Darrius in TV: "The Screaming Jungle" and twice stood in for William Hartnell, died.
 * 1999 - Jack Le White, who went uncredited in TV: The Reign of Terror and The Daleks' Master Plan, died.
 * 1999 - John Arnatt, who played Borusa in TV: The Invasion of Time, died.
 * 1999 - Jack Le White (uncredited in TV: The Reign of Terror and TV: The Daleks' Master Plan) died.
 * 2000 - John Lee (Alydon in TV: The Daleks) died.
 * 2010 - TV: The Bounty Hunter was first broadcast on Five in the UK.