With Halloween approaching, a formidable competitor stirs excitement at the arcade, while Hopper, ever dubious, examines a patch of decaying pumpkins.

The night of Halloween brought Will a sight so dreadful that afterward, Mike couldn't shake the feeling that Eleven might still be somewhere out there. Meanwhile, Nancy grappled with the unsettling reality surrounding Barb's disappearance.

Dustin acquired an unusual pet, a development that steadily frayed Eleven's patience. Meanwhile, the kindly Bob offered Will encouragement to confront his anxieties.

As Will’s condition worsens, he confides in Joyce, the revelation proving deeply unsettling. Meanwhile, Hopper’s investigation leads him closer to a disturbing truth, and Eleven stumbles upon an unexpected finding.

Nancy and Jonathan exchanged whispered speculations, their voices hushed as they confided in a newfound acquaintance. Meanwhile, Eleven embarked on a search for a figure from her forgotten history. Elsewhere, "Bob the Brain" grappled with a…

The tendrils of a darkness, linked to Will, tighten their hold. A growing unease pervades the town, yet no one can discern a way to sever the connection. Meanwhile, an unexpected kinship blossoms between Dustin and Steve.

Eleven's nascent psychic abilities lead her to a group of hardened outsiders, and to a girl haunted by a troubled history.

When a perilous situation forces the lockdown of Hawkins Lab, Will and several others find themselves confined within its walls, an unexpected figure emerges to meet the threat.

Eleven resolved to complete the task she had begun, as the remaining individuals intensified their efforts against the formidable entity that held Will captive.