Stranger Things season 5 fully commits to the show's significant retcon, rewriting its entire backstory. The conclusion of season 4 revealed that Jamie Campbell Bower's Vecna was the true villain all along. This sinister figure, a dark reflection of Eleven, not only created the Mind Flayer but also took control of the Upside Down.
The extent of Vecna's influence and his responsibility for Hawkins' disasters has now been clarified. Netflix released the full opening scene of season 5, showcasing a surprising flashback to season 1.
The scene shows a younger Will (Noah Schnapp) during his time trapped in the Upside Down, finally clarifying what happened after his capture by the Demogorgon. It appears that even the Demogorgon was working under Vecna’s control, as Will was deliberately exposed to the Mind Flayer’s influence.
“It was you,” Eleven (Millie Bobby Brown) realized confronting Vecna in season 4. “It was always you."
This revelation completes the retcon introduced in season 4, profoundly reshaping the show's overall narrative and linking past events directly to Vecna’s manipulations.
Author's summary: Stranger Things season 5 deepens its retcon by exposing Vecna as the mastermind behind Hawkins’ horrors, reshaping the series' history through a shocking flashback.