If you were thinking of the more recent viral "Chapter Four," this episode is famous for confrontation with Vecna. "Stranger Things" Chapter Four: The Body (TV Episode 2016)
The episode begins with the heartbreaking news that Will Byers’ body has supposedly been found in the quarry. While the town prepares for a funeral, Joyce Byers refuses to believe it’s him, insisting she just spoke to him through the lights. Chapter Four: The BodyStranger Things : Season ...
Chief Jim Hopper begins to suspect foul play when he learns the state, not the local coroner, performed the autopsy. In a daring move, he breaks into the morgue and cuts open "Will’s body," only to find it is a high-quality prop stuffed with cotton. If you were thinking of the more recent