This is not a drill! The full trailer for Stranger Things season 4 is here, and it looks darker than ever.
It looks like all of our favourite characters are making a return, including Eleven, Mike, Lucas, Dustin, Will, Max, Steve, Nancy, Jonathan, Robin, Joyce, and even Hopper - who miraculously survived season three.
Netflix' official synopsis reads:
"It's not all good news for our 'American'; he is imprisoned far from home in the snowy wasteland of Kamchatka, where he will face dangers both human... and other,
"Meanwhile, back in the States, a new horror is beginning to surface, something long-buried, something that connects everything."
Creators of the show Matt and Ross Duffer have said this season will open up new plotlines "into areas outside of Hawkins," and they've dubbed season 4 their "Game of Thrones" season, since it's so much longer than previous seasons.
It'll be released in two parts - the first on 27 May and the second on 1 July. So not long to go now!
Check out the trailer up top.