Harriet Walter

Who the hell is Harriet Walter? I pondered, seeing her name twice in succession in my old Time Out Guide: once in a Play for Today called The Imitation Game (1980) - based on an Ian McEwan novel, and it is about code-breaking, though not the Turing story; and again in Reflections (1984) in which she is highly praised. (Both unavailable.*)

Then of course I recognise her:

She's more recently been in London Spy, Downton, The Young Victoria, Little Dorrit, Atonement, Babel, Marple, Bright Young Things, Black Cab (2000 10 x 10 minute series, unavailable) and Morse.

* The Imitation Game is now available on DVD.