i) births and deaths

15 September 1945: birth of Clive Merrison, who played Callum in Tomb of the Cybermen (Second Doctor, 1967) and the Deputy Chief Caretaker in Paradise Towers (Seventh Doctor, 1988).

15 September 1961: birth of Colin McFarlane, who played the oice fo tthe Heavenly Host in Voyage of the Damned (Ninth Doctor, 2007), General Pierce in Torchwood: Children of Earth (2009) and Jonathan Moran in Under the Lake / Before the Flood (Twelfth Doctor, 2014)

15 September 1993: birth of Fady Elsayed, who played Ram Singh in Class (2016).

15 September 1995: death of Alan Bromly, director of The Time Warrior (Third Doctor, 1973-74) and Nightmare of Eden (Fourth Doctor, 1979).

ii) broadcast anniversaries

15th September 1979: broadcast of episode 3 of Destiny of the Daleks. Davros and the Doctor bicker, and the Movellans are revealed to be robots.

15 September 2012: broadcast of A Town Called Mercy, the Eleventh Doctor's Western episode.

iii) date specified in canon

15th September 1954: birth of Pete Tyler, Rose's father.