The Guest (2014)

From the creators of You're Next comes The Guest, a pulse-pounding thriller starring Dan Stevens and Maika Monroe. Recently discharged from the Army, David Collins (Stevens) unexpectedly shows up on the Petersons' doorstep, claiming to be their late son's best friend. Welcomed into their home, the well-mannered stranger becomes part of the family until a shocking wave of violence raises daughter Anna's (Monroe) suspicions that the mysterious ex-soldier is not quite what he seems.