The Season 5 finale of Stranger Things, titled 'The Rightside Up,' concludes the series' nine-year run with a dramatic confrontation against Vecna and the Mind-Flayer. The heroes' final plan involves multiple dangerous missions, including Eleven's confrontation within Vecna's mind and Hopper and Murray's attempt to destroy the Upside Down. The episode features high stakes, character peril, and an ambiguous ending regarding Eleven's fate, leaving viewers to interpret her survival.