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Set 24 years before the events of the first season of Stranger Things, this London West End play focuses on the arrival of Henry Creel, who would later become the demonic creature known as Vecna, trapped in the Upside Down. It has prompted fans to speculate about crossover storylines with the TV show, and it’s described as being totally interwoven with season five, especially in how Vecna’s past is explored. The production is said to still be going strong in London and is also due to open on Broadway in the near future, making it an ongoing, central part of the broader Stranger Things universe rather than just a side project. - Jon Hornbuckle