Ethan Hawke Channels the Joker in New Trailer For "The Black Phone"

"The Black Phone" stars Ethan Hawke as a masked serial killer known as The Grabber. Mason Thomas plays 13-year-old Finney Shaw. Madeleine McGraw plays his little sister, Gwen Shaw, whose visions link her to her missing brother. Jeremy Davies also features as the kids' abusive, alcoholic single father, and James Ransome plays civilian detective Max.