Stranger Things Season 4 Ending Explained (In Detail)

The Stranger Things season 4, episode 9 ending is an explosive finale that has a major setup for season 5. The stakes are higher than ever, with the introduction of Vecna – a terrifying monster eventually revealed to be Dr. Brenner’s Number One. Vecna possesses all Eleven’s powers, and he’s been using them to commit murders from the Upside Down. Season 4 sees all the heroes of Hawkins play their part, with Max putting herself in grave danger to draw Vecna into a trap. It would have backfired badly if not for unexpected, long-range psychic backup from Eleven, who engaged Vecna in a psychic duel.