6 December (releases)


 * 1975 - Part three of The Android Invasion was first broadcast on BBC1.
 * 1986 - Part two of The Ultimate Foe was first broadcast on BBC1, ending the season-long arc known as The Trial of a Time Lord.
 * 1989 - Part three of Survival was first broadcast on BBC1. This was the final episode of the 1963 version of Doctor Who, and by extension its 26th season, to be broadcast.
 * 2011 - The prequel to The Doctor, the Widow and the Wardrobe was released online.