8 Best Upside Down Theories Stranger Things Season 5 Can Finally Confirm

Stranger Things season 5 not only has to give closure to its characters, but it also has to solve many mysteries, especially about the Upside Down, and through that, it can confirm one or more theories about the other dimension. After a long wait, Stranger Things finally returned with its highly-anticipated fourth season, which not only solved the biggest mysteries left by season 3 but also expanded a bit more on the history of the Upside Down and who has been messing with Hawkins this whole time. Stranger Things season 4 introduced Henry Creel, a.k.a. 001, who after being banished to the Upside Down by Eleven, became the creature known as Vecna (Jamie Campbell Bower).