*Warning: Some spoilers for Stranger Things 2*\nStranger Things 2 was delivered to us in the form of the greatest Halloween treat ever.\nWith an amazing blend of '80s pop-culture references, eerie storytelling and mind blowing performances from its young cast, you'd be forgiven for already zipping through all nine episodes faster than you can say 'Upside Down'.\nIn fact, most of us are already wondering when the heck season three will be here. Here's everything we know so far about the 3rd instalment of Stranger Things.\nSeason 3: When will it be announced and when can we expect it?\nTechnically, Netflix hasn't confirmed the third season yet. A third and fourth has been confirmed by co-creators the Duffer brothers, while a possible fifth season has been teased by the show's producer Shawn Levy.\nAs for the release date, don't expect it anytime soon. The first season of Stranger Things was released in July 2016, with the second season being confirmed before it even landed. Fifteen months later, season two came to our laptop screens in late October. Considering the amount of time it takes to write, film and produce nine series, we're going to go ahead and say don't expect season three to rock up anytime before October 2018.\nvia GIPHY\nWe'll be seeing a lot more of Lucas' sister Erica:\nIf you watched the second season, you'll already have a strong inkling that Erica will be getting a heck of a lot more screen time in the upcoming series.\nThe GIF-able younger sister of Luca stole the show for season two. Ross Duffer told Yahoo: “There will definitely be more Erica in season three...‘We got to use more Erica’ — that was one of the first things we said in the writers’ room.”\nAs for the rest of the stars, despite them becoming more popular by the week (Eleven is set to star in Godzilla: King of the Monsters, Hopper is signed up to play Hellboy in the upcoming reboot and Mike will likely return for IT: 2), we'd expect most of the main cast to show up for season three.\nSorry, no Barb. She's dead.\nEleven will find the rest of her siblings\nStranger Things evolves around Dr.Brenner's experiments, and it's highly unlikely that we've seen the end of them - especially now that we know Brenner is alive, and that Kali exists. It's only a matter of time before we find the rest of Eleven's 'siblings'.\nIn fact, what would make the most sense now that the Upside Down is closed (although probably only temporarily), is that the only thing that could destroy it is the combined strength of all of Dr. Brenner's experiments - given that they all have abilities like Eleven. Wouldn't that make a cool final episode.\nKeep an eye out for Dr. Brenner as the main threat in season three.\nThere will definitely be more Mind Flayer\nThe main antagonist of season two is, at this point in the show, contained - but it's not defeated. While Will may be free, it's entirely possible that the Mind Flayer could infect multiple Hawkins residents, like Hopper and Dustin who were sprayed in the face while in the Upside Down.\nIn fact, while speaking to The Hollywood Reporter, The Duffer Brothers gave this tease for season three: "They've shut the door on the Mind Flayer, but not only is it still there in the Upside Down, it's very much aware of the kids, and particularly Eleven. It had not encountered her and her powers until that final episode. Now, it knows that she's out there. We wanted to end on a little bit of an ominous note on that level."\nReally, they all just need to get the hell out of that town.