Coco Chanel once advised that before leaving the house you should remove one thing. The point being that less is more and an overabundance of accessories can spoil an underlying aesthetic. In cinematic terms Don’t Knock Twice takes a simple creepy premise and drenches it in weird plot twists and the two solid central performances are overshadowed by an amateurish supporting cast.
Don’t Knock Twice follows two plot strands; one surrounding teen Chloe (Lucy Boynton) who knocks twice on a door that will apparently summon a witch if knocked on twice and the inevitable fallout from that decision, and a second following Chloe as she tries to reconnect with her estranged mother Jess (Katee Sackhoff). The two storylines intertwine and their relationship is tested by a battle against supernatural forces but the two strands don’t play off each other nicely. This isn’t The Babadook where the monster is a manifestation of the familial issues in the rest of the film.
Sackhoff and Boynton give the film’s only two convincing performances as two damaged souls hesitantly reunited while all hell breaks loose. There’s an decent movie hidden in here somewhere but they are hugely let down by their fellow actors who are in turn given little to work with. One character in particular was often being laughed at by the audience as a result of the bizarre behaviour she was forced to portray. In a horror you need to be able to put yourself into the character’s position and that’s hard when people aren’t behaving like any human you’ve ever met.
That’s not to say that Don’t Knock Twice isn’t effective at the scares though. The witch itself is fantastically realised and there were moments of real terror in the film. One fellow audience member embarrassed himself with the height at which he jumped from his seat, and for once that man wasn’t me. Sadly, as I’ve mentioned, by the end of the film those scares have been diluted by other less successful elements, and a final act that was needlessly complicated and inserted a twist where none was needed.
If Coco Chanel were here I’m sure she would advise taking off the unnecessary twist and the bulk of the weaker supporting players to reveal the well fitted, emotionally fulfilling and delightfully scary horror film about mother-daughter relationships underneath.