The Upside Down has always felt like the heart of ‘Stranger Things‘. It looks like Hawkins, but something is clearly off. From the very first season, fans have known this place wasn’t just created to scare us;

This story contains spoilers from Season 5, Volume 2 of “Stranger Things, now streaming on Netflix. After four-and-a-half seasons of questions prompted by “Stranger Things,” in Volume 2 of the show’s fifth and final season,

It wasn't until after 40 episodes that the mystery of the Upside Down was finally solved. But it was clear for the Duffer Brothers since Season 1 of the show that it is going to be a wormhole. In a recent interview with Deadline, Ross Duffer said,

In Volume 2’s “The Bridge,” it is revealed that the Upside Down is actually part of a wormhole connecting Earth and The Abyss, another dimension occupied by Vecna ( Jamie Campbell Bower ), the Demogorgons, Mindflayer, and more.

The scene is one of several tear-jerkers in the second volume of episodes, released on Christmas Day. In addition to a whirlwind of emotional sequences, the back half of the season is finally beginning to provide some answers about the Upside Down and the evils that Hawkins has been facing this whole time.

This Stranger Things season 5 episode 6 recap covers huge revelations and escape attempts from Henry's mind prison.

Merry Christmas! Stranger Things 5 Volume 1 has arrived. Here's what you need to know and how you can watch the Netflix series online.

Matt and Ross Duffer tease what's in store.