By season 3 of Stranger Things
, we're all pretty familiar with Dustin Henderson
(Gaten Matarazzo). He's emerged as a significant character over the past few years, befriending Steve Harrington (Joe Keery)
, infiltrating a secret Russian facility and, most importantly, getting a girlfriend. While everyone is skeptical of Suzie's existence
for most of the season, the finale finally introduces us to the gloriously nerdy character, played by Broadway star Gabriella Pizzolo. While she and Dustin steal the show with their musical number, there's a detail that Redditors noticed that explains a mystery that may have been driving you nuts throughout the season: Where is Dustin's signature hat?