Based on the book "Hush" by Eva Konstantopoulos.
Filmed at Hunterston House in Ayrshire and a basement at Film City in Glasgow.
James Cosmo and Celia Imrie appeared together in "Highlander" (1986) both as members of the Clan MacLeod.
Creative Scotland Investment: Production Growth Funding, £303,966.
Early in the movie, a sign on the street uses the same font as the American Horror Story universe.