Eddie Munson famously sacrifices himself to lure away the "demobats," and Max Mayfield's encounter with Vecna leaves her in a deep coma.
Eleven manages to temporarily defeat Vecna, but his gates still open, causing a massive "earthquake" that begins the Upside Down's invasion of Hawkins. 3. Game of Thrones — " Baelor "
Season 1's Episode 9 famously features the execution of Ned Stark, the show's perceived protagonist, fundamentally changing the landscape of television.