21 December

On 21 December 1981, the Hecate Cult intended to sacrifice Brendan Richards in Moreton Harwood. However, he was rescued by Sarah Jane Smith and K9 Mark III before this could happen. (TV: A Girl's Best Friend)

21 December 2010 was also the date of an unknown Torchwood Three operation. The date was in both Captain Jack Harkness' and Gwen Cooper's CIA files, detailing the figures of a "case" numbered "00938478766-04". The precise nature of this case remains unknown. (TV: The New World)

Behind the scenes

 * 1937 - Actor Sheila Reid was born.
 * 1945 - Actor Alibe Parsons was born.
 * 1963 - "The Dead Planet" was first broadcast on BBC1.
 * 1968 - Episode eight of The Invasion was first broadcast on BBC1.
 * 1982 - Actor Edmund Bailey died.
 * 1989 - Actor Edmund Warwick died.
 * 1999 - Actor Jack Le White died.
 * 1999 - Actor John Arnatt died.
 * 2000 - Actor John Lee died.
 * 2010 - The Bounty Hunter was first broadcast on Five.
 * 2012 - Actor Daphne Oxenford died.