13 June 2019: death of Audrey Arlington, who played the Abbess in Eye of the Gorgon (SJA, 2007), and Mrs Poggit in Amy's Choice (Eleventh Doctor, 2010)
13 June 1964: broadcast of "The Day of Darkness", fourth episode of the story we now call The Aztecs. Cameca helps the Tardis crew escape, and Aztec history continues as it had always done.
13 June 1970: broadcast of sixth episode of Inferno. The Doctor and friends fight through to the Tardis console in the parallel Earth, and the Doctor escapes though the others are doomed.