Watch: Did Stranger Things' Eleven Die in the Series Finale? The Duffer Brothers Say...Warning: This article contains major spoilers for Stranger Things season five, volume three. Friends don't lie-and neither does Sadie Sink. After the Stranger Things series finale ended with Mike Wheeler (Finn Wolfhard) sharing an alternate ending for Eleven (Millie Bobby Brown), who was believed to have died while destroying the Upside Down, Sadie shared her opinion of what really happened. "I think she's dead," the actress-who played Max Mayfield in the Netflix show's last four seasons-admitted on the Jan.