4 July (releases)


 * 1964 - "Hidden Danger" was scheduled to air on BBC1, but was postponed to the 11th due to an extended episode of airing in the same time slot.
 * 1970 - Part four of the TV Comic story The Fishmen of Carpantha was first published.
 * 1994 - The Visitation and Black Orchid were released together on VHS, as was Destiny of the Daleks.
 * 2007 - Robot was released on Region 4 DVD.
 * 2008 - The Baktek Illusion was first released online.
 * 2016 - Broken was first released by Big Finish.
 * 2016 - Ghost Light was first published by Obverse Books.