We still don’t know when the next season of Stranger Things is coming, but Netflix has at least released some details on the upcoming prequel, The First Shadow. It’s set in 1959 and is billed as an origin story for a number of important Stranger Things elements including Vecna and the Upside Down itself — the twist is that it’s a stage show that opens up in London in December. You can get a taste for it in the teaser below.