Anecdotes

Will Poulter spent 5-6 hours every day in the make-up chair getting his burn prosthetics applied, and another hour getting it removed. He said that he actually found the hour-long removal more uncomfortable than all the hours of putting it on.

Based on the novel of same name by Sarah Waters.

In the book, Dr. Farraday is said to be considerably older than Caroline (about 15ish years her senior). Domhnall Gleeson is actually a year younger than Ruth Wilson in real life.

Second collaboration between Domhnall Gleeson and Will Poulter; the first was The Revenant (2015).

The book of the same name on which this film is based was author Sarah Waters' first novel not to have a lesbian as the main protagonist.