i) births and deaths

14 May 1925: birth of Ysanne Churchman, the voice of Alpha Centauri in The Curse of Peladon (Third Doctor, 1972) and The Monster of Peladon (Third Doctor, 1974), a Spider in Planet of the Spiders (Third Doctor, 1974), and returned at the age of 92 to reprise Alpha Centauri in The Empress of Mars (Twelfth Doctor, 2017), which must make her the oldest person to have been creatively involved with the show in any medium

also 14 May 1925: birth of Tristram Cary, who wrote incidental music for six First Doctor stories and two later ones. Here’s “The Forest”, from the story we now call The Daleks.

14 May 1927: birth of Dennis Chinnery, who played Albert C. Richardson (the first mate of the Mary Celeste) in The Chase (First Doctor, 1965), Gharman in Genesis of the Daleks (Fourth Doctor, 1975) and Sylvest, father of the twins in The Twin Dilemma (Sixth Doctor, 1984).

14 May 1942: birth of Prentis Hancock, who played a reporter in Spearhead from Space (Third Doctor, 1970), Vaber in Planet of the Daleks (Third Doctor, 1973), Salamar in Planet of Evil (Fourth Doctor, 1975) and The Ribos Operation (Fourth Doctor, 1978).

14 May 1973: birth of Indira Varma, who played Suzie Costello in two episodes of the first series of Torchwood (2006).

ii) broadcast anniversaries

14 May 1966: broadcast of "Johnny Ringo", third episode of the story we now call The Gunfighters. Ring arrives in search of Doc Holiday, with fatal consequences for Charlie the barman and (indirectly) Warren Earp.

14 May 1996: broadcast of Doctor Who: The Movie on Fox. The Doctor arrives in San Francisco at the end of December 1999, and regenerates after being shot; the resurrected Master attempts to take the Doctor's body and/or destroy the Earth, but Grace prevents him.

14 May 2005: broadcast of Father's Day. Rose prevents her father's death, causing tremendous paradoxes which can be fixed only for a very high price.

14 May 2011: broadcast of The Doctor's Wife. The TARDIS as you have never seen her before.