Season 4 starts by catching you up with the "gang" and where their all at but then episode 4 is the episode that shows us Millie Bobby Brown is no longer the main character and that for this season at least it's the Sadie show and boy did she earn it. As far as the younger kids on the show go Sadie's the only one with true honest to god Hollywood level acting chops. She's headed towards a flourishing career and shows us why in this episode.