12 January

History of Doctor Who

 * 1974 - DW: Invasion of the Dinosaurs, Episode 1, is first broadcast.
 * 1980 - DW: The Horns of Nimon, Episode 4, is first broadcast.
 * 1982 - DW: Castrovalva, Episode 4, is first broadcast.
 * 1983 - DW: Arc of Infinity, Episode 4, is first broadcast.
 * 1984 - DW: Warriors of the Deep, Episode 3, is first broadcast.
 * 1985 - DW: Attack of the Cybermen, Episode 2, is first broadcast.
 * 2010 - Hornets' Nest: The Complete Series is released on CD.