El is bullied at school. Joyce opens a mysterious package. A scrappy player shakes up D&D night. Warning: Contains graphic violence involving children.

Terror reigns in the food court when the Mind Flayer comes to collect. But down below, in the dark, the future of the world is at stake.

With time running out — and an assassin close behind — Hopper’s crew races back to Hawkins, where El and the kids are preparing for war.

Nancy and Jonathan follow a lead, Steve and Robin sign on to a secret mission, and Max and Eleven go shopping. A rattled Billy has troubling visions.

Summer brings new jobs and budding romance. But the mood shifts when Dustin’s radio picks up a Russian broadcast, and Will senses something is wrong.

Dr. Brenner holds Hopper and Joyce for questioning while the boys wait with Eleven in the gym. Back at Will’s, Nancy and Jonathan prepare for battle.

Eleven struggles to reach Will, while Lucas warns that “the bad men are coming.” Nancy and Jonathan show the police what Jonathan caught on camera.

A frantic Jonathan looks for Nancy in the darkness, but Steve’s looking for her, too. Hopper and Joyce uncover the truth about the lab’s experiments.

Hopper breaks into the lab while Nancy and Jonathan confront the force that took Will. The boys ask Mr. Clarke how to travel to another dimension.

Lucas, Mike and Dustin try to talk to the girl they found in the woods. Hopper questions an anxious Joyce about an unsettling phone call.

On his way home from a friend’s house, young Will sees something terrifying. Nearby, a sinister secret lurks in the depths of a government lab.

When a young boy vanishes, a small town uncovers a mystery involving secret experiments, terrifying supernatural forces, and one strange little girl.