i) births and deaths
8 June 1933: birth 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)
8 June 1942: birth of Peter Grimwade, director of Full Circle (Fourth Doctor, 1980), Logopolis (Fourth Doctor, 1981), Kinda (Fifth Doctor, 1982) and Earthshock (Fifth Doctor, 1982) and writer of Time-Flight (Fifth Doctor, 1982), Mawdryn Undead (Fifth Doctor, 1983) and Planet of Fire (Fifth Doctor, 1984).
8 June 1943: birth of Colin Baker, who played the Sixth Doctor from 1984 to 1986 and also Bayban Commander Maxil in Arc of Infinity (Fifth Doctor, 1982).
He was kind enough to send me greetings on my own birthday recently.
8 June 1951: birth of Tim Munro, who played played Ainu in The Creature from the Pit (Fourth Doctor, 1979) and Sigurd in Terminus (Fifth Doctor, 1983).
8 June 2011: death of Roy Skelton, whose first voice work was for the Monoids in The Ark (First Doctor, 1966) and did Dalek voices all the way from Evil of the Daleks (Second Doctor, 1967) to The Curse of Fatal Death (alternate Doctors, 1999). He had three on-screen roles as well, Wilfred Norton in Colony in Space (Third Doctor, 1972), James the chemicals man in The Green Death (Third Doctor, 1973), a role hastily invented when another actor fell ill halfway through filming, and King Rokon of the Kastrians in The Hand of Fear (Fourth Doctor, 1976).
8 June 2013: death of Angus MacKay, who played Cardinal Borusa in The Deadly Assassin (Fourth Doctor, 1976) and Sellick the headmaster in Mawdryn Undead (Fifth Doctor, 1982).
ii) broadcast anniversaries
8 June 1974: broadcast of sixth episode of Planet of the Spiders, ending Season 11; last regular appearance of Jon Pertwee as the Doctor and last appearance on TV of Richard Franklin as Mike Yates. The Doctor defeats the Great One, but is poisoned by radiation and regenerates.