In the teaser, the series looks to venture into unchartered territory as the opener introducers viewers to a snow-ridden railroad in a mysterious Russian location.
But the biggest surprise of all is that Chief Jim Hopper (David Harbour) is back despite his disappearance last season.
Executive producer Shawn Levy told Collider in April that there is no reason to worry about the story continuing. "I will say we have a good sense of stuff that happens in Season 4," he said. "Season 4 is definitely happening."
But, don't get too reattached as the Duffy brothers, the creators behind the series, told Vulture in 2017 that this could be the final instalment. “We’re thinking it will be a four-season thing and then out,” Ross Duffer said. His brother, Matt, followed: “I don’t know if we can justify something bad happening to them once a year.”
If that's not enough to see you cancel any clashing social plans, Netflix later shared a sneak glimpse at the cast kicking things off with their first season 4 table reading.
Filmed using an old school camcorder effect, the show's favourite characters reunite to flick through the forthcoming script.
This show is nothing without the young teens that lead it, so expect to see the usual crew: Eleven (Millie Bobby Brown), Mike (Finn Wolfhard), Dustin (Gaten Matarazzo), Will (Noah Schnapp), Lucas (Caleb McLaughlin), and Max (Sadie Sink).
And let’s not discount Erica (Priah Ferguson), Lucas’s little sister, who brings a lot of humour and not-not-nerdy knowhow to those death-defying moments.
Expect to see Steve (Joe Keery), Nancy (Natalia Dyer), Jonathan (Charlie Heaton), and Robin (Maya Hawke) too.
The release date has yet to be announced.
This article originally appeared on marie claire Australia.