The season follows a group of friends, a worried mother, a police chief, and tense siblings as they navigate a mystery involving a creature from another dimension that kidnaps a boy named Will Byers, and an escapee child test subject who attempts to evade her former captors.

Casting: Winona Ryder, David Harbour, Finn Wolfhard, Millie Bobby Brown, Gaten Matarazzo, Caleb McLaughlin, Natalia Dyer, Charlie Heaton, Cara Buono, Matthew Modine, Noah Schnapp, Sadie Sink, Joe Keery, Dacre Montgomery, Sean Astin, Paul Reiser, Maya Hawke, Priah Ferguson, Brett Gelman, Robert Englund, Jamie Campbell Bower, Eduardo Franco, Joseph Quinn.