Mad Men alum Jared Harris stars with Sam Claflin, Olivia Cooke, Erin Richards and Rory Fleck-Byrne in supernatural thriller. The Hammer production sets Harris as a professor who leads his students off the grid for an attempt to raise a poltergeist from negative human energy. John Pogue directs The Quiet Ones from a script he wrote with Craig Rosenberg and Oren Moverman. Lionsgate has North America and the UK, where the film begins its rollout April 11. Here’s the spooky first trailer: