While Super Bowl LI brought joy to some and sadness to others, it's safe to say our collective world was turned Upside Down when Netflix dropped the trailer for Stranger Things season two.

In the intense trailer for the followup to the massively acclaimed first season of the ‘80s-set thriller series, we see the return of Eleven (Millie Bobby Brown) teased, along with some indications that the monster who shook the lives of several Hawkins, Indiana, residents is about to meet the town on a much larger scale.

EXCLUSIVE: 'Stranger Things' Creators Dish on Season 2's New Cast Members Sean Astin & Paul Reiser

Watch the trailer, complete with the haunting opening credits music, below.

Netflix is bringing back their breakout show around Halloween, which, while thematically appropriate, also means we have even more time to wait to see what happens.

WATCH: 'Stranger Things': 7 Things We Learned From the Season 2 Table Read

Thankfully, the show producers recently teased the new season to ET.

Watch the video below.