i) births and deaths
15 January 1934: birth of Richard Franklin, who played Mike Yates in four of the five Third Doctor seasons (1971-74).
15 January 1941: birth of Geoffrey Beevers, who played the Master in The Keeper of Traken and with Big Finish. Was married to Caroline "Liz Shaw" John until her death.
15 January 1948: birth of David Warwick, who played Kimus in The Pirate Plant (Fourth Doctor, 1978) and the police commissioner in Army of Ghosts (Tenth Doctor, 2006); former partner of Louise "Leela" Jameson.
ii) broadcast anniversaries
15 January 1966: broadcast of "Escape Switch", tenth episode of the story we now call The Daleks' Master Plan. The Daleks take Steven and Sara hostage and force the Doctor to hand over the taranium core. But the Doctor steals the directional unit from the Monk's Tardis. I incorrectly used a snap from this episode last week; here it is again.
15 January 1972: broadcast of third episode of Day of the Daleks. The Doctor travels to the future, is captured by the controller and the Daleks, and subjected to mind analysis (summoning images of the First Doctor and Second Doctor).
15 January 1979: broadcast of third episode of The Face of Evil. The Doctor and Leela are captured by the Tesh and narrowly escape being subjected to particle analysis (disintegration); the Doctor confronts the mad computer Xoanon.