A teaser for the fourth season of Stranger Things has just dropped - and fans are already hunting for clues.
The cryptic clip, which was released on the official Twitter account, seems to take place at the Hawkins National Laboratory, in a place called the 'Rainbow Room,' which, for those who don't know, served as a playroom for Dr Brenner's test subjects.
It saw seven old-school TV screens in a circle showing static noise.
One by one the screens turn on for a few seconds, displaying creepy images, which included a door handle, a chessboard and an eight ball from a game of billiards, all with blood spatter on them.
The description says: "Due to technical difficulties, Hawkins National Laboratory will be closed until further notice. We will be back in service tomorrow at 9:00AM ET".
Fans were sent into a frenzy as they made a connection between the eight TV screens and the eight ball to Kali Prasad, also known as Eight (played by Linnea Berthelsen), as it was speculated that she'd be making a return.
One person said: "Wait Eight TV screens?? That means Kali is in S4."
Another fan wrote: "okay rainbow room ?!"
Kali is a recurring character who was introduced in the second season as a test subject like Eleven (Millie Bobby Brown) at the lab.
The girls grew close over the three episodes that Kali featured before never being seen again.
Could she be making a return?
But other viewers were "more confused than ever" over the clip, as someone else said: "I can't keep having breakdowns every day."
A few people also believed that the description of the video '002/004' was a sign that there were another two trailers coming before the release of the fourth season.
What did you make of the trailer? Let us know in the comments.
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