i) births and deaths

22 January 1940: birth of Sir John Hurt, who played the War Doctor (The Day of the Doctor, 2013).

22 January 1950: birth of Pamela Salem, who played Toos in The Robots of Death (Fourth Doctor, 1977) and Rachel Jensen in Remembrance of the Daleks (Seventh Doctor, 1988).

22 January 1993: birth of Tommy Knight, who played Sarah Jane Smith's adopted son Luke in the Sarah Jane Adventures.

22 January 2008: death of Kevin Stoney, who played Mavic Chen in the story we now call The Daleks' Master Plan (First Doctor, 1965-66), Tobias Vaughn in The Invasion (Second Doctor, 1968), and Tyrum in Revenge of the Cybermen (Fourth Doctor, 1975).

ii) broadcast anniversaries

22 January 1966: broadcast of "The Abandoned Planet", eleventh episode of the story we now call The Daleks' Master Plan. The Doctor, Sara and Steven arrive on Kembel and release the Daleks' prisoners; but Mavic Chen takes them captive. The episode is lost; this is the front page of Rick Lundeen's glorious comics adaptation.

22 January 1971: broadcast of fourth episode of Day of the Daleks. The Controller lets the Doctor and Jo return to the twentieth century, and Shura blows up Styles' house with the Daleks in it.

22 January 1977: broadcast of fourth episode of The Face of Evil. Xoanon becomes sane and the Tesh and Sevateem agree to live in peace; Leela leaves with the Doctor.