FILM 1537: BEFORE I GO TO SLEEP
TRIVIA: In the novel, Christine's diary is in the form of a journal / notebook, whereas in the film it is a camera.
This is one of two 2014 on screen collaborations for Mark Strong and Colin Firth, and the fourth overall, The others being Kingsman: The Secret Service (2014), Tinker Tailor Soldier Spy (2011), and Fever Pitch (1997)_.
Nicole Kidman studied amnesiacs in preparation for this film, including watching a documentary on Clive Wearing.
Director Rowan Joffe's own mother suffers from amnesia.