A new documentary about the making of "Stranger Things" Season 5 includes some surprising behind-the-scenes revelations.

A documentary about the making of the final season of "Stranger Things" is out now. Here's how to watch the Netflix project.

The fifth and final season of Stranger Things ended on New Year's, showing the final battle against Vecna as well as an extensive epilogue about what happened to our beloved characters. In it we learn that Nancy dropped out of college in favor of a job, with Dyer speaking to Deadline about why she fought for that narrative choice. In her words:

"One Last Adventure" reveals the behind-the-scenes debate about whether to include demogorgons in the Abyss battle.

The Making of Stranger Things 5," on Netflix Monday, is the streaming service's first full behind the scenes feature.

The behind-the-scenes doc 'One Last Adventure', highlighting the epic final season, is now streaming on Netflix.

The finale (which, BTW, hadn't been written when episode 1 was filmed, according to the documentary) features Eleven sacrificing herself to save Mike and the rest of the Party, even though Mike still has hope that it was all an illusion and she survived.

Millie Bobby Brown was emotional as she read the ending for her Stranger Things character for the first time.

That’s all because at the end of Wicked: For Good, it’s revealed that Elphaba actually survived the bucket of water being thrown on her; she did not melt, she used a trap door to hide. However, no one, except Fiyero, knows that. So, she leaves Oz forever with him, and Glinda stays behind, not knowing that her friend survived.