12 January (releases)

On 12 January, a number of things set in or relevant to the Doctor Who universe were released or published.


 * 1974 - "Invasion" was first broadcast on BBC1.
 * 1980 - Part Four of The Horns of Nimon was first broadcast on BBC1.
 * 1982 - Part Four of Castrovalva was first broadcast on BBC1.
 * 1983 - Part Four of Arc of Infinity was first broadcast on BBC1.
 * 1984 - Part Three of Warriors of the Deep was first broadcast on BBC1.
 * 1985 - Part Two of Attack of the Cybermen was first broadcast on BBC1.
 * 2013 - Period of Readjustment was first broadcast on BBC One, beginning Series 6 of Panopticon.