"Stranger Things" final season premieres Dec. 31, 2025, wrapping up the series with a climactic battle against the Upside Down.

The final season of "Stranger Things" is set to premiere on December 31, 2025, concluding the series' eight-year run. The latest trailer reveals the Hawkins crew preparing for a climactic battle against escalating supernatural threats from the Upside Down, with emotional farewells and high-stakes action. The season will resolve long-standing mysteries, including the origins of the Upside Down and Vecna’s true nature, as the group defends Hawkins and potentially the entire world.