Season 1

Complete listed story — includes the ending

S1E1 · Chapter One: The Vanishing of Will Byers

On November 6, 1983, in Hawkins, Indiana, a scientist is attacked by an unseen creature at a U.S. government laboratory. 12-year-old Will Byers encounters the creature and mysteriously vanishes while cycling home from a Dungeons & Dragons session with his friends Mike Wheeler, Dustin Henderson and Lucas Sinclair. The following day, Will's single mother Joyce Byers reports his disappearance to the police chief Jim Hopper, who launches a town-wide search. The lab's director, Dr. Martin Brenner, investigates an organic substance oozing from the lab's basement, claiming that "the girl" cannot have gone far. "The Girl", wearing a hospital gown, wanders into a local diner. The owner, Benny, finds a tattoo of "011" on her arm and learns that her name is Eleven. Brenner, monitoring the phone lines, sends agents to the diner after Benny calls social services. The agents kill Benny, but Eleven manages to escape using telekinetic abilities. Joyce's phone short circuits after receiving a mysterious phone call that she believes is from Will. While searching for Will in the woods, Mike, Dustin, and Lucas come across Eleven.

S1E2 · Chapter Two: The Weirdo on Maple Street

The boys bring Eleven to Mike's house, where they disagree on what to do. Mike formulates a plan for Eleven to pretend to be a runaway and seek help from his mother, Karen. Eleven refuses, however, revealing that "bad men" are after her. Will's brother Jonathan visits his estranged father Lonnie in Indianapolis to search for Will, but Lonnie rebuffs him. Hopper's search party discovers a scrap of hospital gown near the lab. After recognizing Will in a photograph and demonstrating her telekinesis, Eleven convinces the boys to trust her, as they believe she can find Will. Using the Dungeons & Dragons board, Eleven indicates that Will is on the "Upside Down" side of the board and is being hunted by the " Demogorgon " (the creature). Mike's sister Nancy and her friend Barbara 'Barb' Holland go to a party with Nancy's boyfriend Steve Harrington. Searching for Will near Steve's house, Jonathan secretly photographs the party. Joyce receives another call from Will, hears music playing from his stereo, and sees a creature coming through the wall. Left alone by the swimming pool, Barb is attacked by the Demogorgon and vanishes.

S1E3 · Chapter Three: Holly, Jolly

Barb awakens in the Upside Down, a decaying, overgrown alternate dimension. She attempts to escape but is attacked by the Demogorgon. Joyce believes Will is communicating through pulses in light bulbs. Hopper visits Hawkins Lab, and the staff permits him to view doctored security footage from the night Will vanished, leading Hopper to investigate Brenner and discover his involvement with Project MKUltra and that a woman named Terry Ives alleged years earlier that Brenner took her daughter. Eleven recalls Brenner, whom she calls "Papa," punishing her for refusing to hurt a cat telekinetically. Steve destroys Jonathan's camera after discovering the photos from the party. Nancy later recovers a photo of Barb, simultaneously realizing that Barb is missing. Returning to Steve's house to investigate, Nancy finds Barb's untouched Volkswagen and encounters the Demogorgon but manages to escape. Joyce paints an alphabetic board on her wall with Christmas lights, allowing Will to sign to her that he is "RIGHT HERE" and that she needs to "RUN" as the Demogorgon comes through the wall. Believing Eleven knows where Will is, the boys ask her to lead them to him. Eleven leads them, to their frustration, to Will's house. From there, they follow emergency vehicles to a nearby quarry just as Will's body is recovered from the water.

S1E4 · Chapter Four: The Body

Joyce refuses to believe that the body found at the quarry is Will's. Mike feels betrayed by Eleven until she proves that Will is still alive, channeling his voice through Mike's walkie-talkie. The boys theorize that Eleven could use a ham radio at their school to communicate with Will. Nancy notices a figure behind Barb in Jonathan's photo, which Jonathan realizes matches his mother's description of the Demogorgon. Nancy tells the police about Barb's disappearance. She later fights with Steve, who not only does not care about Barb but only cares about not getting in trouble with his father. Hopper has suspicions regarding the authenticity of the body found in the quarry when he learns that the usual coroner was sent home. Hopper confronts the state trooper who found it and beats him until he admits he was ordered to lie. The boys sneak Eleven into their school to use the radio, while Joyce hears Will's voice through her living room wall. Tearing away the wallpaper, she sees him. Eleven uses the radio to channel Will talking to his mother. Hopper goes to the morgue and finds that the body is a fake, and, suspecting that Brenner is responsible, breaks into the lab.

S1E5 · Chapter Five: The Flea and the Acrobat

Hopper searches the lab before being knocked out by the lab's guards. The boys ask their science teacher, Mr. Clarke, if it would be possible to travel between alternate dimensions, to which he answers that there could be a theoretical "gate" between dimensions. Hopper awakens at his house and finds a hidden microphone, realizing that Joyce was right the whole time. The boys follow their compasses, searching for a gate that could disrupt the Earth's electromagnetic field. Eleven recalls memories of being placed in a sensory-deprivation tank to telepathically eavesdrop on a Soviet man speaking Russian; while listening, she accidentally came across the Demogorgon. Fearing another encounter with the Demogorgon, Eleven redirects the compasses. Lucas misinterprets this as an act of betrayal, leading Mike and Lucas to fight and Eleven to telekinetically fling Lucas away from Mike. While Dustin and Mike tend to the unconscious Lucas, Eleven runs off. Nancy and Jonathan formulate a plan to kill the Demogorgon. While searching in the woods, they come across a small gate to the Upside Down. Nancy crawls through it but inadvertently draws the Demogorgon's attention. Jonathan unsuccessfully tries to look for Nancy, as the gate to the Upside Down begins to close.

S1E6 · Chapter Six: The Monster

After finding the small gate, Jonathan pulls Nancy back through it. That night, Nancy is afraid to be alone and asks Jonathan to stay in her bedroom. Steve, attempting to reconcile with Nancy, sees them together through her bedroom window and assumes they are in a relationship. Joyce and Hopper track down Terry Ives, who is catatonic and tended by her sister Becky. Becky explains that Terry was a Project MKUltra participant while unknowingly pregnant and that Terry believes Brenner kidnapped her daughter Jane at birth due to her supposed telekinetic and telepathic abilities. Nancy and Jonathan stockpile weapons to kill the Demogorgon, theorizing that it is attracted by blood. Steve is brutally beaten up in a fistfight with Jonathan after he insults Will and calls Nancy a slut. Jonathan is arrested and held at the police station for beating up Steve and inadvertently punching one of the responding officers in the face while Steve's group flees. Eleven walks into a grocery store and shoplifts several boxes of Eggo waffles. Searching for Eleven, Mike and Dustin are ambushed by two bullies, Troy and James, who try to kill Mike. Mike is rescued by Eleven, who uses her powers to break Troy's arm. Eleven collapses and recalls being asked by Brenner to contact the Demogorgon and, in her terror, inadvertently opening the gate. She tearfully admits to Mike and Dustin that she is responsible for allowing the Demogorgon to enter this dimension. Lucas sees agents, who have tracked down Eleven, preparing to ambush Mike's house.

S1E7 · Chapter Seven: The Bathtub

Lucas warns Mike that agents are searching for Eleven. Mike, Dustin, and Eleven flee the house while Brenner and his agents chase the kids using vans. Eleven telekinetically flips one of the vans that block their path as the kids escape. Lucas reconciles with Mike and Eleven, and the kids hide in the junkyard. Nancy and Jonathan reveal their knowledge of the Demogorgon to Joyce and Hopper. Hopper learns from Troy that Eleven is with the kids. The kids, teens, and adults all meet at the Byers' house, where Joyce and Hopper realize that Eleven is Jane Ives. The group asks Eleven to search for Will and Barb telepathically, but her earlier feats have weakened her. They break into the middle school and build a makeshift sensory deprivation tank to amplify Eleven's powers. After telepathically entering the Upside Down again, Eleven finds Barb dead and Will alive, hiding in the Upside Down version of his backyard fort. Realizing that the gate is in the basement of the lab, Hopper and Joyce break into the lab and are apprehended by security guards. Nancy and Jonathan sneak into the police station to retrieve the weapons they purchased previously, planning to lure and kill the Demogorgon. In the Upside Down, the Demogorgon breaks into Will's fort.

S1E8 · Chapter Eight: The Upside Down

Hopper, haunted by the death of his daughter Sara from cancer years earlier, gives up Eleven's location to Brenner, who in exchange allows Hopper and Joyce to enter the Upside Down to rescue Will. Nancy and Jonathan cut their hands to attract the Demogorgon at the Byers' house. Steve, intending to apologize to Jonathan about their fight, arrives just as the Demogorgon appears. Steve, Nancy, and Jonathan fight the Demogorgon and light it on fire, forcing it to retreat back into the Upside Down. Meanwhile, Eleven and the boys hide in the middle school when Brenner and his agents arrive to kidnap Eleven; she kills most of them before collapsing from exhaustion. As Brenner and his remaining agents pin Eleven and the boys down, the Demogorgon appears, attracted by the dead agents' blood, and attacks Brenner and the remaining agents as the boys escape with Eleven. Hopper and Joyce enter the Upside Down's version of the Hawkins library, where they encounter several corpses of the Demogorgon's victims, including Barb, and find Will unconscious with a tendril down his throat. Hopper revives him using CPR after removing the tendril. The Demogorgon corners the kids, but Eleven recovers from her exhaustion and disintegrates it, causing them both to disappear. Will recovers in the hospital, reuniting with his family and friends. One month later, it is Christmas and Nancy is back together with Steve, and both are friends with Jonathan. Will coughs up a slug-like creature and has a vision of the Upside Down, but hides this from his family.