However, viewers were kept in the dark until season five's second batch of episodes, now streaming on Netflix.

Fans finally got answered about the Upside Down in Stranger Things season 5. Here's more of what we know about this world.

Stranger Things' has pulled back the curtain, finally explaining to fans the truth of what the Upside Down is after nine long ...

We finally know what the Upside Down really is in Stranger Things — get details on the major reveal in Season 5, Volume 2.

Here’s how Matt Duffer explained the major turning point in the history of Stranger Things: ...

It's certainly satisfying to get the answers about the Upside Down that have evaded audiences for so long, but, in some ways, ...

After four-and-a-half seasons of questions prompted by “Stranger Things,” in Volume 2 of the show’s fifth and final season, ...

The scene is one of several tear-jerkers in the second volume of episodes, released on Christmas Day. In addition to a ...

Volume 2 finally revealed the truth behind the Upside Down, which the creators of 'Stranger Things' confirm has been planned ...

The show’s score has plummeted in the wake of the release of the second batch of episodes from season five, falling to a ...

After keeping us in the dark for almost 10 years, Stranger Things has finally revealed what the Upside Down actually is – and ...

Though the second part of the show's fifth season is being released Christmas night, the series finale won't be available to ...