
Cold open: the demo-dogs breach the lab
Hopper and the lab staff watch the pack test the glass from the other side; the defences fail and the alarm goes up as the attack starts.
20 moments · 28 min of essential viewing in a 48-minute episode.

Hopper and the lab staff watch the pack test the glass from the other side; the defences fail and the alarm goes up as the attack starts.

With the lab overrun, Mike argues Will is a spy for the shadow monster. Joyce asks her screaming son if he knows her before holding him down to sedate him.

Max is missing and Billy was supposed to watch her. His father Neil drags him off his date, forces an apology to Susan and makes him go find his sister.

Steve lets slip that Dustin's pet ate the cat. Lucas and Dustin trade rule-of-law accusations until Steve notices the demo-dogs are all heading to the lab.

Only Bob knows BASIC, so he insists on going down to the basement alone. Hopper teaches him the gun in four words, and Bob promises to get everyone out.

Alone in the dark basement, Bob resets the breakers and reboots the system while Nancy and Jonathan rattle the gate outside. The locks release and he cheers.

The stairwell is no longer clear. Bob improvises with an extinguisher, hands over the radio, and is talked through the corridors until he has to hide.

Told he is almost home free, Bob makes a break for the lobby. Joyce arrives just in time to watch and Hopper has to drag her away.

Grieving at the Byers house, the kids remember Bob founded Hawkins AV, then Dustin defends his compound word and Mike realises the army answers to one master.

The party lays out the shadow monster as a hive mind and reaches for a D&D analogy. Hopper calls it a kids' game; Dustin says the manual is not for kids.

No one trusts the military to stop this. Joyce says she wants to kill it, Hopper agrees, and Mike points out the one person connected to the thing is Will.

Dustin offers to give up his spot in the party for Lucas's girlfriend. Lucas says she is not his girlfriend; Dustin says he could feel the electricity.

Max says she gets why El was Mike's mage. Mike keeps her at arm's length, then admits El was awesome until the thing took her, just like it took Bob.

In the shed, Will comes round bound and surrounded by family. Joyce says they only want to talk; he demands to know why he is tied up until his voice gives out.

Joyce reminds Will of his eighth birthday, the box of 120 colours and the spaceship drawing she hung at work and showed to everyone.

Jonathan recalls the night their dad left, when he and Will stayed out in the rain building the fort because they just had to finish it.

Mike tells Will about the swings, the question he asked and the yes that was the best thing he ever did. Joyce begs Will to answer, and he does with two words.

Will is talking without words. The group feeds him memories while Dustin and Lucas decode the taps letter by letter into a two-word instruction.

A ringing phone cuts through the shed. Everyone freezes hoping Will did not hear it, but he did, and the house has to move fast.

Hopper orders everyone from the windows and Nancy takes the shotgun. The pack circles outside, then one comes crashing through, already dead.

The leader of the group of friends, the first to shelter Eleven. Played by Finn Wolfhard.

The group's curious, sharp-tongued scientist, never without a theory. Played by Gaten Matarazzo.

Hawkins' police chief, a man with a lost past who takes the Byers case seriously when nobody else does. Played by David Harbour.

The group's skeptic, quickest to question Eleven and to act. Played by Caleb McLaughlin.

Will's mother, who refuses to believe her son is gone and will tear her house apart to reach him. Played by Winona Ryder.

Mike's older sister, pulled from her own high-school life into the search. Played by Natalia Dyer.

The party: the three boys, their walkie-talkies and every argument. 70 scenes together, in story order.

Will's older brother, a loner with a camera who looks for his brother his own way. Played by Charlie Heaton.

The quiet boy whose disappearance on his way home sets everything in motion. Played by Noah Schnapp.

The chief and the mother who refuses to be told she is crazy. 46 scenes together, in story order.

The girl next door and the loner with the camera, monster-hunting together. 46 scenes together, in story order.

The popular senior dating Nancy, more than the hair suggests. Played by Joe Keery.

The new girl in Hawkins, a skateboarder with the arcade high score and a stepbrother she fears. Played by Sadie Sink.

A mother talking to her lost boy through fairy lights, then nursing him back. 34 scenes together, in story order.

The skateboarder from California and the boy who kept turning up at her arcade. 29 scenes together, in story order.

The high-school couple whose romance the Upside Down pulls apart. 25 scenes together, in story order.

The babysitter and the kid with the pet demodog: the show's best friendship. 20 scenes together, in story order.

Joyce's kind boyfriend from the RadioShack, a puzzle solver who wants a quiet life. Played by Sean Astin.

The lab's new director, gentler than Brenner, keeping watch on Will. Played by Paul Reiser.

Max's stepbrother, the new king of Hawkins High, all menace and mullet. Played by Dacre Montgomery.