‘Stranger Things’ has confirmed Sadie Sink is returning for season five. The Netflix sci-fi favourite is back in production for its coming fifth and final season, and the streaming platform has shared a behind the scenes photo of the cast and crew getting to work. In the snap, Sadie can be seen among her cast members, despite her character Max Mayfield’s fate being uncertain at the end of season four. The post on the show’s official social media accounts read: “THIS IS A CODE RED. STRANGER THINGS 5 production has officially begun!!! (sic)” As well as Sadie, the black and white picture also inc…