31st August 1932: birth of Roy Castle, who played Ian in the Doctor Who and the Daleks movie with Peter Cushing (1965).
31st August 1991: death of Gerry Davis, script editor of Doctor Who from The Celestial Toymaker (1966) to part 3 of The Evil of the Daleks (1967), co-writer of The Tenth Planet (1966), The Highlanders (1967), and Tomb of the Cybermen (1966-67), and sole writer of Revenge of the Cybermen (1975)
31st August 2005: death of Michael Sheard, who played Rhos in The Ark (1966), Dr. Summers in The Mind of EvilPyramids of Mars</b> (1975), Lowe in The Invisible Enemy (1977), the Mergrave in Castrovalva (1982), and the Headmaster in Remembrance of the Daleks (1988)
ii) broadcast and production anniversaries
31st August 1968: broadcast of fourth episode of The Dominators. Jamie and Cully manage to destroy a Quark; the Dominators threaten to take revenge by killing the Doctor.
31st August 1990: John Nathan-Turner resigns as producer after a decade, and the Doctor Who production office is closed by the BBC.