11 May 2001: death of Douglas Adams, writer of The Pirate Planet (1978) and Shada (unbroadcast but would have been 1980), co-author of City of Death (1979) and script editor for Season 17 (1979-80); best known, of course, for other things
ii) broadcast anniversaries
11 May 1968: broadcast of third episode of The Wheel in Space. Cybermats have infiltrated the Wheel, and the Cybermen have laid a trap in their spaceship.
11 May 1974: broadcast of second episode of Planet of the Spiders, the one with the interminable chase sequence.
11 May 2013: broadcast of Nightmare in Silver. Children, Cybermen, an abandoned amusement park and a script by Neil Gaiman.