i) births and deaths

27 March 1935: birth of Julian Glover, who played King Richard in The Crusade (First Doctor, 1965) and Scaroth in City of Death (Fourth Doctor, 1979). I met him last year at a convention in Brussels.

27 March 2014: death of Derek Martinus, who directed the story we now call Galaxy 4 (First Doctor, 1965), Mission to the Unknown (First Doctor, though he's not actually in it, 1965), The Tenth Planet (First Doctor, 1966), The Evil of the Daleks (Second Doctor, 1967), The Ice Warriors (Second Doctor, 1967) and Spearhead from Space (Third Doctor, 1970).

ii) broadcast anniversaries

27 March 1965: broadcast of "The Lion", first episode of the story we now call The Crusade. Barbara is captured by Saracens; the Doctor, Ian and Vicki ask King Richard to rescue her.

27 March 1971: broadcast of third episode of The Claws of Axos. The Doctor and Jo are captives of the Axons; the Master offers to blow them all up, and the Brigadier agrees.