“The Boogeyman” is a horror-thriller from the mind of best-selling author Stephen King. High school student Sadie Harper and her younger sister Sawyer are reeling from the recent death of their mother and aren’t getting much support from their father, Will, a therapist who is dealing with his own pain. When a desperate patient unexpectedly shows up at their home seeking help, he leaves behind a terrifying supernatural entity that preys on families and feeds on the suffering of its victims. “The Boogeyman” stars Sophie Thatcher (“Yellowjackets”), Chris Messina (“Birds of Prey”), Vivien Lyra Blair (“Obi-Wan Kenobi”), Marin Ireland (“The Umbrella Academy”), Madison Hu (“Bizaardvark”), LisaGay Hamilton (“Vice”), and David Dastmalchian (“Dune”). Rob Savage directs from a screenplay by Scott Beck & Bryan Woods and Mark Heyman. Warning: Some flashing-lights scenes in this film may affect photosensitive viewers.