Down — [s1e8] Chapter Eight: The Upside

: The Demogorgon corners the kids in a classroom. Eleven pins it to a wall, says "Goodbye, Mike," and uses the last of her energy to disintegrate the monster. Both she and the creature vanish in a cloud of particles. The Epilogue: One Month Later

: During dinner, Will excuses himself to the bathroom where he coughs up a slug-like creature and sees a brief, terrifying flash of the Upside Down, indicating he is still connected to the dimension.

: Chief Hopper and Joyce Byers are captured at Hawkins National Laboratory. To save Will, Hopper makes a deal with Dr. Brenner: he reveals Eleven's location (the middle school) in exchange for safe passage into the Upside Down and the lab's silence regarding their past activities. [S1E8] Chapter Eight: The Upside Down

: Hopper is seen getting into a mysterious government car outside the hospital. Later, he leaves food—including Eggo waffles —in a wooden box in the woods, suggesting he knows or believes Eleven is alive. Trivia & Easter Eggs

The episode ends on Christmas Eve, establishing several "loose ends" for the following seasons: : The Demogorgon corners the kids in a classroom

: Brenner and his agents corner Eleven and the boys at Hawkins Middle School. Eleven uses her powers to kill the agents but is left severely weakened. The Demogorgon, attracted by the blood, attacks Brenner and his team, allowing the kids to escape.

: Nancy and Steve are still dating, though they remain friendly with Jonathan. The boys finish a D&D campaign, celebrating their victory over the "Thessalhydra". The Epilogue: One Month Later : During dinner,

: In the Upside Down, Joyce and Hopper find a "nest" in the library. They find Will unconscious with a fleshy tendril down his throat; Hopper performs CPR—flashing back to his daughter Sara's death—and successfully revives him.