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, Finn Wolfhard, Gaten Matarazzo, Caleb McLaughlin, Joe Keery, Winona Ryder, David Harbour, Natalia Dyer, Charlie Heaton, Maya Hawke, Sadie Sink, Jamie Campbell Bower, Brett Gelman, Paul Reiser, Matthew Modine,
