He was the guy everyone loved to hate. Then, suddenly, everyone just felt bad for him. Billy Hargrove, Max’s brother in Stranger Things, is probably the most polarizing character the Duffer Brothers ever dreamt up. He didn't start as a hero. Far from it. When he rolled into Hawkins in that loud blue Camaro, blasting Scorpions, he was a textbook sociopath with a generic 80s mullet and a chip on his shoulder the size of Indiana.
Billy was dangerous.
Most people remember him as the guy who tried to run over the kids on their bikes or the guy who almost beat Steve Harrington to a pulp in a suburban kitchen. But if you look closer at the seasons, especially the transition between Season 2 and Season 3, the role of Max’s brother in Stranger Things evolves from a simple neighborhood bully into a tragic sacrificial lamb. It’s a messy, uncomfortable arc. Honestly, that’s why we’re still talking about him years after he was skewered by a Mind Flayer meat-monster at the Starcourt Mall.
The Brutal Reality of Billy and Max’s Relationship
Max and Billy weren't actually blood relatives. They were step-siblings, forced together by a marriage that neither of them seemed particularly happy about. Max (Sadie Sink) was the "cool skater girl" trying to find her footing in a new town, while Billy (Dacre Montgomery) was the resentful, displaced Californian taking his anger out on anyone within arm's reach.
He was mean. Really mean.
He called her "Maxine" just because he knew she hated it. He controlled who she hung out with. He threatened Lucas. But the show eventually peeled back the curtain to show us why. We saw Neil Hargrove. Neil was Billy’s father, and to put it bluntly, the man was a monster. There’s a specific scene in Season 2 where Neil shoves Billy against a wall and uses a racial slur while demanding he find his sister. It’s hard to watch. It’s also the exact moment you realize Billy isn't just a jerk; he’s a victim of a cycle of abuse that he’s unfortunately perpetuating on Max.
Experts in media psychology often point to Billy as a "cycle-breaker" who failed before he succeeded. He spent his whole life being told he was nothing by his father, and in turn, he treated Max like she was nothing. It’s a toxic dynamic that feels grounded in a way the Demogorgons just aren't.
Why the Mind Flayer Picked Max's Brother
In Season 3, Billy’s role shifted from human antagonist to supernatural puppet. When the Mind Flayer needed a "host" to build its physical form in our world, it didn't pick a random person. It picked the strongest, most volatile person it could find.
Billy was the perfect vessel.
The possession of Max’s brother in Stranger Things is some of the best body horror the show has ever produced. Dacre Montgomery’s performance here is actually insane—the sweating, the bulging veins, the crying while he’s kidnapping people to be melted into goop. You can see the "real" Billy trapped behind his eyes, screaming to get out.
The Memory of the Beach
The turning point for the audience—and for Max—was the "Memory Fair" sequence. Eleven dives into Billy’s mind and finds a memory of a young Billy at a beach. He’s happy. He’s watching his mom surf. He’s not the monster yet. This is the moment Eleven realizes that Billy isn't just the Mind Flayer's tool; he’s a broken kid who misses his mother. It’s the key she uses to snap him out of the possession in the finale.
Without that specific insight into Max’s brother, the ending of Season 3 wouldn't have landed. He stood up to a skyscraper-sized monster to save Eleven and Max, taking the hits until he literally couldn't stand anymore. He died apologizing to Max. "I'm sorry," he says. That’s it. Those were his last words.
The Aftermath: How Billy’s Death Changed Season 4
If you thought Billy was gone after Season 3, you clearly haven't watched "Dear Billy." Season 4 is basically a 13-hour exploration of Max’s grief and guilt. Even though Billy was terrible to her, he was her brother. He died saving her. That creates a level of cognitive dissonance that most teenagers can't handle.
Max’s trauma is what Vecna feeds on.
The Grave Scene
The scene where Max sits at Billy’s grave and reads her letter is arguably the emotional peak of the entire series. She admits she doesn't know if they could have ever been friends. She admits she stays away from people now because she’s broken. Vecna uses Billy’s image to taunt her—appearing as a bloodied, angry version of her brother to convince her that she secretly wanted him to die.
It’s dark. It’s heavy. And it proves that Max’s brother in Stranger Things is just as important to the story dead as he was alive. His shadow looms over everything she does.
Addressing the Controversies
Let’s be real: Billy is a controversial character. Some fans think he was "redeemed" too easily. Others point out his blatant racism toward Lucas in Season 2 as something that a simple "I'm sorry" at death can't fix.
The show doesn't really try to excuse him, though. It just explains him.
There’s a difference between a character being "good" and a character being "well-written." Billy was a bad person who did a good thing at the very end. That doesn't make him a saint; it just makes him human. The Duffer Brothers have been quoted saying they wanted a "human" villain because sometimes people are scarier than monsters. They succeeded.
What to Watch For in the Final Season
With Season 5 on the horizon, the question is: are we done with Billy?
Probably not.
Since Vecna uses memories and trauma to torment his victims, and Max is currently in a comatose state, there’s a very high chance we’ll see Max’s brother in Stranger Things one last time. Whether it’s a flashback or another Vecna-induced hallucination, Billy is the key to Max’s psyche. To wake up, she has to fully process what happened to him.
Actionable Insights for Fans and Rewatchers
If you’re planning a rewatch before the final season drops, keep these things in mind to get a better handle on the Billy/Max dynamic:
- Watch the background in Season 2: Notice how Billy reacts whenever he sees a phone or hears a car—he’s constantly on edge, waiting for his father’s disapproval. It contextualizes his aggression.
- Pay attention to the color palette: In Season 3, Billy is often associated with the color blue (his car, the water at the pool, the beach memory), which contrasts with the red/orange "Upside Down" colors. It represents his lost childhood.
- Compare Steve and Billy: Both started as bullies. Steve had a support system and changed. Billy had a monster for a father and didn't have a chance until it was too late.
- Analyze the letter: Read the lyrics or the transcript of Max’s letter to Billy in Season 4. It reveals she actually blames herself for not being "faster" to help him, even though there was nothing she could have done.
Billy Hargrove wasn't a hero, but he was a vital part of the Stranger Things DNA. He represented the grounded, ugly reality of domestic pain in a world otherwise occupied by interdimensional monsters. Understanding Max's brother is the only way to truly understand Max herself.