i) births and deaths

27 January 1984: death of Douglas Camfield, who directed the third episode of Planet of Giants (1964), also The Crusade (1965), The Time Meddler (1965), The Daleks' Master Plan (1965-66), The Web of Fear (1968), The Invasion (1968), much of Inferno (1970), Terror of the Zygons (1975) and The Seeds of Doom (1976).

ii) broadcast anniversaries

27 January 1968: broadcast of sixth episode of The Enemy of the World. Salamander is overthrown, but tries to take control of the Tardis by pretending to be the Doctor. The real Doctor opens the doors and Salamander is blown into the Vortex. The programme was followed by a trailer for The Web of Fear in which the Doctor warns children that it may be frightening.

27 January 1973: broadcast of first episode of Carnival of Monsters; first appearance of Ian Marter (though not as Harry Sullivan). Vorg and Shirna land on Inter Minor with their Mini Scope; the Doctor and Jo land on the SS Bernice in the Indian Ocean, where the passengers and crew repeat the same dialogue every few minutes and a giant hand removes the Tardis.

27 January 1979: broadcast of second episode of The Armageddon Factor. (I'm due to get to this in my rewatch tomorrow.) K9 almost gets melted, and the Doctor is trapped by the bad guys.

27 January 1984: broadcast of second episode of Frontios. Turlough threatens the Orderlies with the Tardis hatstand, and the Tractators capture the Doctor.

27 January 1996: broadcast of second episode of The Ghosts of N-Space on BBC Radio. The Doctor and Sarah explore earlier periods of the castle's history by projecting themselves through N-Space: in 1818 they are menaced by a heavy stone falling towards them.