Millie Bobby Brown Debuts Red Hair at Stranger Things 5...

18. Also slated to perish was Eleven. Yes, really. "Eleven was going to sacrifice herself to save the day," Ross said in the 2018 book Stranger Things: Worlds Turned Upside Down. "That was always the end game. But once we realized that the show was potentially going to go on longer than one season, we needed to leave it more up in the air, because deep down we knew the show just wouldn't really work without Eleven. And at that point, we knew how special Millie was. If there was going to be more Stranger Things, Eleven had to come back."