This article contains spoilers for Stranger Things Season 3.
If you’ve stayed up late to binge through Season 3 of Stranger Things, we salute you – and we’re guessing you probably have one big question on your mind: Who is the American mentioned in the Season 3 post-credits scene? For our theory, scroll down beneath the Mind Flayer.
Source: IGN.com Stranger Things Season 3 Spoilers: Who Is That Mystery Character