Hit Netflix sci-fi drama "Stranger Things" returns this week with the first part of its highly-anticipated season four promising more supernatural horrors besetting the fictional Indiana town of Hawkins. Set six months after season three ended with the gruesome Starcourt mall battle, season four sees the young protagonist friends separated after Eleven, played by Millie Bobbi Brown, moved to California with Joyce (Winona Ryder) and her two sons, Will and Jonathan.