26 May (releases)


 * 1973 - Episode two of The Green Death was first broadcast on BBC1.
 * 1973 - Part four of Back to the Sun was first published in TV Action.
 * 2007 - Human Nature was first broadcast on BBC One. Later, Alter Ego aired on BBC Three.
 * 2013 - The Doctors Revisited - The Fifth Doctor was first broadcast on BBC America, followed by a rebroadcast of Fifth Doctor story Earthshock.