19 February 1966: broadcast of "Priest of Death", third episode of the story we now call The Massacre. Admiral de Coligny is shot and wounded; the Abbot (or is it the Doctor???) is killed.
19 February 1972: broadcast of fourth episode of The Curse of Peladon. The Ice Warriors kill Arcturus who was behind it all; Aggedor kills Hepesh; and all ends happily.
19 February 1977: broadcast of fourth episode of The Robots of Death. The Doctor alters the voice of Dask/Taran Capel with helium, and he is killed by his own robots.