The highly anticipated finale of 'Stranger Things' Season 5, titled 'The Rightside Up,' is set to premiere on December 31st globally and January 1, 2026, in India. This final episode, the longest in the series at over two hours, promises a climactic showdown between Eleven and Vecna. Executive producers hint at deep revelations about Vecna's backstory and satisfying, surprising outcomes for the decade-long narrative, concluding the Hawkins gang's fight against the Upside Down.