11 August 1922: birth of Ron Grainer, who composed the Doctor Who theme tune. According to the lore, he was so gobsmacked by Delia Derbyshire's electronic arrangement of the music that he asked her, "Did I really write this?" "Most of it," she replied. Of course he got the on-screen credit and she didn't. This is maybe how he would have expected it to sound:
11 August 1932: birth of John Gorrie, director of The Keys of Marinus (1964) and the third episode of The Reign of Terror (1964)
11 August 1939: birth of Ian Thompson, who played Hetra, leader of the Optera, in the story we now call The Web Planet (First Doctor, 1965) and Malsan the Aradian in the story we now call The Chase (also First Doctor, 1965).
11 August 1979: birth of Niky Wardley, who played Eighth Doctor audio companion Tamsin Drew in 2010-11, and also appears in the 2007 Comic Relief sketch with the Tenth Doctor and as Steven Moffat's receptionist in The Five(ish) Doctors Reboot (2013).
11 August 1994: death of Peter Cushing, who played Doctor Who in Doctor Who and the Daleks (1965) and Daleks - Invasion Earth 2150 AD (1966), and much else besides.
11 August 1996: death of Derek Newark, who played caveman Za in the story we now call An Unearthly Child (First Doctor, 1963) and engineer Greg Sutton in Inferno (Third Doctor, 1970).
ii) broadcast anniversaries
ii) date specified in-universe
11 August 1901: eight people go missing from Chuirch Stretton, as reported in the 2008 Torchwood episode, From Out of the Rain.