i) births and deaths

11 February 1989: death of John Bailey, who played the Commander in The Sensorites (First Doctor, 1964), Edward Waterfield in The Evil of the Daleks (Second Doctor, 1967) and Sezom in The Horns of Nimon (Fourth Doctor, 1980).

11 February 1993: birth of Jordan Renzo, who played Matteusz in Class (2018).

ii) broadcast anniversaries

11 February 1967: broadcast of first episode of The Moonbase. The Tardis lands on the Moon, near the base which controls Earth's weather. Crew members are falling ill; but it is the Cybermen behind it all.

11 February 1978: broadcast of second episode of The Invasion of Time. The Doctor expels Leela from the Capitol, and laughs as three alien beings materialise in the Panopticon.