Stranger Things has come to an end after running for almost ten years, and it ended with both the Mind Flayer and Vecna dying. While Season 4 and most of Season 5 of the show implied that Vecna was behind the Demogorgans, Demodogs, the shadow monster, Billy Hargrove going rogue, and Will's abduction, the finale does connect him with the Mind Flayer.In the last episode of Stranger Things Season 5, we learn through Henry visiting Vecna's most traumatic memory, that he was taken over by the Mind Flayer when he was a child. That was the beginning of a journey he would end up taking that would lead him straight to his death, and the finale of the show explained it in detail. Speaking to Tudum by Netflix, Jamie Campbell Bower, who plays Vecna/Henry in Stranger Things, explained the deeper connection between his character and the Mind Flayer.Jamie Campbell Bower explains the connection between Vecna and the Mind Flayer in Stranger ThingsIn Stranger Things finale episode, Chapter Eight: The Rightside Up, Henry overcomes his fear of the cave in Camazotz when he has to get to the kids who are trying to escape, to complete his plan of merging the worlds. We see him overcome his fear of the cave, and enter it to get closer to kids and learn that as a child, he had stumbled upon an unnamed scientist in the Nevada desert, and killed him with a rock when he shot at Henry's hand, suspecting him to be a threat. Henry then opened the scientist's briefcase and found a rock which had the Mind Flayer particle. It possessed him, and asked him to find it. Speaking to Tudum by Netflix, Jamie Campbell Bower spoke about Henry, saying that the rock was“the reason he lost his youth, his childhood, his love, his heart.” View this post on Instagram Instagram PostWhen the adult Henry saw that memory, he remembered the moment that changed his life forever. At that time, Will tried to convince him that he was just a child who got manipulated by the Mind Flayer by speaking to him in his mind. But Henry deeply believed that whatever the Mind Flayer showed him was real, and that they were one and the same. Campbell Bower spoke about the scene, saying:"Henry says, ‘No, it showed me that this world is broken, that man is broken.’ ”He continued:“It was the first moment in Season 5 [where] I truly felt human again and understood him. I felt like I’ve been wanting to protect him all this time, because I felt like all the people just hate him. And it was at that moment that I was like, ‘Now you see why I am [the way I am].’ ”It was this moment of Stranger Things that showed us how Henry even came to know the Mind Flayer, and that the connection shared between them was too strong to be tethered now. As Stranger Things co-creator, Ross Duffer also said in an interview with Tudum by Netflix:“Even though he is shaken by seeing this memory, he’s too far gone at this point to turn against the Mind Flayer.” View this post on Instagram Instagram PostDuffer continued:“We wanted to leave it up to the audience in terms of whether young Henry did choose this or whether it was simply the Mind Flayer controlling him from beginning to end.”Henry strongly believes that the young him chose to believe in the Mind Flayer and that wasn't controlled by it. Instead, he believed that he and the Mind Flayer were working together, and refuses to betray it. As Ross Duffer also pointed out, whether he was truly controlled or not, Henry chose to stick by the Mind Flayer, which became his last choice. Ross Duffer said:“But ultimately, in terms of where Henry goes, it doesn’t matter because he chooses the side of the Mind Flayer at the end of the day.”Thus we can't know for sure if Henry was always controlled by the Mind Flayer or not, but we do know that it was the Mind Flayer particle that changed Henry's life forever.All episodes of Stranger Things are streaming on Netflix.For more articles like this, follow Soap Central.