The sound of a Theremin can be heard prominently in the soundtrack. Although rarely used these days due to its association with old horror and science fiction films of the 1950s, in the 1920s, the Theremin was considered a revolutionary and new musical instrument and representative of the dawn of the age of electricity. This is in keeping with Louis Wain's view of electricity being the future of life.
Unusually for a modern film, this movie was shot in the 4:3 screen ratio. This was done to reflect the early days of motion picture photography and was the cinema standard until the 1950s when wide-screen formats started to dominate.
Although the character of Emily Richardson is ten years older than Louis, Claire Foy is eight years younger than Benedict Cumberbatch.
His mother was a textile designer in Leek Staffordshire, and his art is still celebrated in Leek.
All the main cast from director Will Sharpe's first project, Flowers (2016), appear in some capacity in this movie, including Sophia Di Martino, Olivia Colman, Julian Barratt and Daniel Rigby.