The episode's climax is a masterclass in non-linear storytelling, revealing that three seemingly separate characters are the same person:
Hopper and Enzo are forced into a "gladiator" pit to face a Demogorgon for the amusement of prison guards. Murray and Joyce successfully infiltrate the prison, allowing for a long-awaited and emotional reunion between Joyce and Hopper. Watch Stranger Things S04E07 WEBRip x264-ION10 1
Steve, Nancy, Robin, and Eddie fight off "Demobats" after being dragged into the alternate dimension. They discover the Upside Down is frozen in time on the day Will Byers first went missing. Meanwhile, in the real world, Dustin, Lucas, and Max realize that every Vecna murder creates a new "Watergate" (portal). The episode's climax is a masterclass in non-linear