But when she tries to emerge from Billy’s mind, it’s clear that something has gone wrong. As she makes her way closer to the source, Billy’s memories worsen, seeming to indicate that the Mind Flayer is feeding off of the darkest moments of his life to maintain control over him.Įventually, El makes it to the memory of the night that the Mind Flayer possessed him and discovers that the source was the steel works. She then spots the red lightning storm that signifies the Mind Flayer’s presence raging in the distance and begins to walk toward it. She could’ve killed me.”Īfter diving into Billy’s mind, El finds herself inside one of Billy’s best childhood memories - showing off his surfing skills to his mom on a beach in California - in a scene that gives off major Inception vibes. Luckily, thanks to an assist from Mike, El is able to use her powers to throw Billy through the brick wall of the pool house, where he runs off into the night.īack at the steel works, Billy gives Heather a rundown of the night: “It was her. The physical effects of the Mind Flayer’s possession - a web of black veins - then appear all over Billy’s body and, in a fit of superhuman strength, he bursts through the chained door and almost gets the best of El in a head-to-head fight. But as the heat rises, the Mind Flayer becomes fully activated and forces Billy to smash through the sauna’s glass window with a shard of tile and try to stab Max.

Once they get him inside, it seemed at first like it was the real Billy begging Max for help and insisting that the bad things he had done weren’t his fault.

To figure out if the Mind Flayer has attached itself to Billy, the gang comes up with a plan to trap him in the pool’s sauna room and turn up the heat to see if it would trigger the Mind Flayer.

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