School is out, pool is open. Welcome to summer of ‘85 in Hawkins.

Netflix has just opened registration for summer camp with the official trailer for “Stranger Things” 3, premiering July 4. The trailer is full of emotion, reintroducing our favorite characters, all of which aren’t kids anymore. It looks like all of the fun of summer-themed movies only with a twist of horror. Just wait until you see the evolution of the Demogorgon!

One summer can change everything…

Returning for Season 3 are Winona Ryder as Joyce Byers, David Harbour as Chief Jim Hopper, Finn Wolfhard as Mike Wheeler, Noah Schnapp as Will Byers, Millie Bobby Brown as Eleven, Caleb McLaughlin as Lucas Sinclair, Gaten Matarazzo as Dustin Henderson, Cara Buono as Karen Wheeler, Natalia Dyer as Nancy Wheeler, Charlie Heaton as Jonathan Byers, Joe Keery as Steve Harrington, Dacre Montgomery as Billy, and Sadie Sink as Max, among others.

Cary Elwes, known for both Princess Bride and SAW, will play a character named Mayor Kline, while Starship Troopers, The Frighteners, and The Predator‘s Jake Busey will play a character named Bruce. Maya Thurman-Hawke, the daughter of Uma Thurman and Ethan Hawke, will play an “alternative girl” bored with her mundane day job. She seeks excitement in her life and gets more than she bargained for when she uncovers a dark secret in Hawkins, Indiana.

Francesca Reale (“Haters Back Off”) has been cast in a major recurring role as Heather, a popular lifeguard at the Hawkins Community Pool who becomes the centerpiece of a dark mystery.

Season 2 actress Priah Ferguson, who played Lucas’ scene-stealing sister Erica, has been upped to a series regular. She’ll return with an army of her own friends. No longer content with sitting on the sidelines, Erica finds herself on a wild mission to save Hawkins from a dangerous new threat.

The series is created by The Duffer Brothers, who also serve as executive producers and directors along with Shawn Levy (who also directs), Dan Cohen and Iain Patterson. “Stranger Things” is a Netflix production.