The Stranger Things documentary director is breaking her silence after the two-hour special caused fans to think creators Ross and Matt Duffer used ChatGPT to write the show's series finale. One Last Adventure: The Making of Stranger Things 5, which premiered on Monday, January 12, showed a moment where Ross and Matt, both, 41, used a Google Document to structure their ideas for the series finale. A shot of their laptops caused some fans to point out a tab that appeared to be ChatGPT.