14 September 1961: birth of Justin Richards, who has written more Doctor Who books than any other living writer (though still some way off Terrance Dicks).
14 September 1972: birth of Jenny Colgan, also a writer of several Doctor Who books, better known to the general public for her other writing.
14 September 2006: death of Peter Ling, who wrote the 1968 Second Doctor story The Mind Robber (though not the first episode; see below).
14 September 2014: death of Angus Lennie, who played the scavenger Storr in The Ice Warriors (Second Doctor, 1967) and the landlord Angus MacRanald in Terror of the Zygons (Fourth Doctor, 1975).
14 September 2018: death of Zienia Merton, who played Ping-Cho in the story we now call Marco Polo (First Doctor, 1964) and the registrar in The Wedding of Sarah Jane Smith (Sarah Jane Adventures, 2009) - perhaps the longest gap between first and second appearances in the TV Whoniverse that we will ever see.
ii) broadcast anniversaries
14 September 1968: broadcast of first episode of The Mind Robber, one of the best single episodes of all time, written at short notice by script editor Derrick Sherwin when it became apparent that Peter Ling's script would not fill the time made available by cutting The Dominators. The Doctor escapes the lava flow by taking the Tardis outside space and time, to a mysterious white void, where it explodes, leaving Zoe memorably clinging to the console.
14 September 1987: broadcast of episode 2 of Time and the Rani. The Doctor escapes the Tetraps, but is caught again, and the Rani prepares to drain his brain.