As Hopper braces to battle a monster, Dustin dissects Vecna's motives — and decodes a message from beyond. El finds strength in a distant memory.

Eleven makes plans to finish what she started while the survivors turn up the heat on the monstrous force that's holding Will hostage.

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 selfless hearts and a clash of metal, heroes fight from every corner of the battlefield to save Hawkins — and the world itself.

Max is in grave danger... and running out of time. A patient at Pennhurst asylum has visitors. Elsewhere, in Russia, Hopper is hard at work.

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.

An unlikely hero steps forward when a deadly development puts the Hawkins Lab on lockdown, trapping Will and several others inside.

The military tightens its grip on the town. Mike, Lucas and Robin orchestrate a daring escape. El comes face-to-face with the enemy.

Will's connection to a shadowy evil grows stronger, but no one's quite sure how to stop it. Elsewhere, Dustin and Steve forge an unlikely bond.

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.

Refusing to believe Will is dead, Joyce tries to connect with her son. The boys give Eleven a makeover. Nancy and Jonathan form an unlikely alliance.

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.

A code red brings the gang back together to face a frighteningly familiar evil. Karen urges Nancy to keep digging, and Robin finds a useful map.

On the anniversary of Will's disappearance, the party reunites to prepare for a battle with world-altering implications.

Psychic visions draw Eleven to a band of violent outcasts and an angry girl with a shadowy past.

November, 1987. The gang evades the military to scour the Upside Down for Vecna — but fails to notice a threat lurking closer to home.

After a vicious attack at the Wheeler home, Mike and Nancy confront the cost of secrecy, while El and Hopper embark on a rescue mission.

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.

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.

As Holly and Max fight to escape Vecna's mind, El must find a way into Will's. Joyce wrestles with guilt. Jonathan and Nancy face a turning point.

The gang hatches an electrifying plan to reconnect Will to the hive mind. Tensions flare during a search of the Upside Down's Hawkins Lab.

As the town preps for Halloween, a high-scoring rival shakes things up at the arcade, and a skeptical Hopper inspects a field of rotting pumpkins.

Owens takes El to Nevada, where she's forced to confront her past, while the Hawkins kids comb a crumbling house for clues. Vecna claims another victim.

Will gains unique insight into Vecna's next move, giving the crew an opportunity to set a trap. Holly explores her new surroundings.

El is bullied at school. Joyce opens a mysterious package. A scrappy player shakes up D&D night.

After Will sees something terrible on trick-or-treat night, Mike wonders whether Eleven's still out there. Nancy wrestles with the truth about Barb.