7th August 1924: birth of Kenneth Kendall, who appeared as a newsreader in The War Machines (1966), the first celebrity to portray himself on Doctor Who (unless you count the Beatles).
7th August 1952: birth of Alexei Sayle, who plays the DJ in Revelation of the Daleks (1986). 'Allo John, got a new motor? Is there life on Mars? Is there life in Peckham?
7th August 1999: death of Ric Felgate who played Roy Stone (the American reporter) in The War Machines (1966), Brent (Ms Kelly's assistant) in The Seeds of Death (1969) and Van Lyden (the astronaut sent to look for the others) in The Ambassadors of Death (1970)