The Quiet Ones struggles with an identity crisis. It’s the first period piece/found footage/slow burn inspired by true events that’s creepy but confusing, tense but toothless.
There seems to have been good intentions with great production values, a refined cast, plenty of atmosphere, aural spookiness, and a story that seems like it would be really interesting if it made any sense. But the final script seems to have been cobbled together from a series of drafts (or studio notes?), and I kept wondering if there was a “missing reel”. So much was left unexplained and one wonders what the point was, or why it's even called "The Quiet Ones" (which is a terrible title).
It’s also quite repetitive which increases the tedium: slow build, random obvious paranormal activity, and then Jared Harris thrashing about how they should continue with the experiment because nothing paranormal is happening. Rinse and repeat.
Hammer Films has produced two of the best horror films in recent memory (The Woman in Black, Let Me In) but The Quiet Ones misses the mark almost entirely. The most fascinating thing about this film was seeing the pictures of the real people portrayed in the film during the credits. That alone has piqued my curiosity and improved the overall experience.