12 January (releases)


 * 1974 - Episode one of Invasion of the Dinosaurs was first broadcast on BBC1.
 * 1976 -
 * 1980 - Episode four of The Horns of Nimon was first broadcast on BBC1, ending Doctor Who's seventeenth season.
 * 1982 - Episode four of Castrovalva was first broadcast on BBC1.
 * 1983 - Episode four of Arc of Infinity was first broadcast on BBC1.
 * 1984 - Episode three of Warriors of the Deep was first broadcast on BBC1.
 * 1985 - Episode two of Attack of the Cybermen was first broadcast on BBC1.
 * 2010 - The complete Hornets' Nest was released for the first time together in one CD.