18 January 1969: broadcast of fourth episode of The Krotons. The Doctor makes up some sulphuric acid; Zoe uses it to poison off the Krotons, and Jamie uses it to destroy the Dynotrope.
18 January 1975: broadcast of fourth episode of Robot, which is the first I remember watching all the way through. The robot starts disintegrating people, but the Doctor manages to destroy it with metal-eating virus.
18 January 1982: broadcast of first episode of Four to Doomsday. Rather than Heathrow, the Tardis lands on a spaceship controlled by Monarch and inhabited by humans from four different eras of history.
18 January 1983: broadcast of first episode of Snakedance. Rather than Earth, the Tardis lands on Manussa, home of the Mara; Tegan is possessed by it and gets away from the Doctor and Nyssa.
I sometimes find these links very handy, and I never say so — so I’m mentioning it now.
In particular, on this occasion, as I’m working my way along my friends page Julia is sat opposite me with the new Bujold and reading out choice moments to me (mostly whenever someone makes a sharp comment about what Ivan’s up to at the moment), so the Tor piece is timely.
Thank you, then, not just for this link but for the reasonable proportion of the others that I also like.