"Stranger Things" Season 5, Volume 2 finally reveals the origins of the Upside Down. Here’s how the wormhole works, what the ...

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

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

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

Eleven accidentally created the Upside Down when she opened the gate in Stranger Things season 1. This happened during her ...

It's also the home of demons, so it makes a ton of sense that the Duffer Brothers would incorporate this into the final ...