31 May 1940: birth of Peter Mayock who played Ibrahim Namin in Pyramids of Mars (Fourth Doctor, 1975) and Solis in The Deadly Assassin (Fourth Doctor, 1976)
31 May 1948: birth of Lynda Bellingham, who played the Inquisitor in the Sixth Doctor's Season 23 (1986), and returned to the role for some excellent Big Finish plays.
31 May 1983: birth of Reggie Yates who played Martha's brother Leo in the 2007 series of Doctor Who.
ii) broadcast anniversaries
31 May 1969: broadcast of seventh episode of The War Games. The Doctor and friends start a rebellion, capturing the 1917 chateau from General Smythe.
31 May 2008: broadcast of Silence in the Library; first appearance of Alex Kingston as River Song. The Doctor and Donna meet a team of archaeologists exploring a planet-sized library, and endangered by the Vashta Nerada.
31 May 2010: broadcast of Robot Gladiators, twenty-first episode of the Australian K9 series. K9 and the crew take on and shut down an illegal, underground robot fight club.
One more month to go in this project. It's been interesting to come back to this ten years on - there's actually been much less Who since 2011 than there was in the 2005-10 period, when you also had Torchwood and Sarah Jane in the mix, so the updates have generally not needed to be substantial.