When a boy goes missing, a small town uncovers a mystery involving top-secret testing, terrifying supernatural powers, and a strange little girl.
Millie Bobby Brown, Noah Schnapp, Finn Wolfhard, Gaten Matarazzo, Caleb McLaughlin, Sadie Sink, David Harbour, Winona Ryder, Natalia Dyer, Charlie Heaton, Joe Keery, Priah Ferguson, Maya Hawke, Brett Gelman, Jamie Campbell Bower, Nell Fisher, Amybeth McNu,
