Mayor of Kingstown Season 4 finale recap and ending explained: The McLusky brothers get closure, but the war isn’t over

The Mayor of Kingstown Season 4 finale is titled Belly of the Beast. It dropped on December 28, 2025.

The Season 4 finale doesn’t hold back. It brings the violence fans expect, and while some storylines receive a rough kind of closure, the show makes it clear that Kingstown’s battles aren’t over yet. The McLusky brothers finally face off with Merle Callahan, a clash that’s been brewing forever.

At the same time, things get even more chaotic between the Crips, the Colombians, and the prison system that keeps throwing fuel on the fire.

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Mayor of Kingstown Season 4 finale recap

The Mayor of Kingstown Season 4 finale kicks in right in the middle of Don’s Diner (Mike McLusky’s regular haunt), which gets lit up by three guys in full riot gear with guns blazing. This hit isn’t random, not even close. It’s surgical and personal. Mike, Kyle, and Ian barely scrape by, but Stevie gets shot. That’s the kind of “message” you can’t miss.

Mike and Ian drop two of the gunmen. Kyle wrestles the last one down, and you can see him fighting every urge not to end the guy right there. Turns out, the person they caught is Billy, who is not just someone random. He is Aryan Brotherhood, loyal to Merle Callahan, and apparently Callahan’s right-hand. Mike’s worst fear is now confirmed: Callahan is still lurking in Kingstown, dead set on finishing the twisted business he started.

Ian has to keep Billy out of official hands, so he lies to Captain Walter, saying there were only two shooters. Shady, but that’s Kingstown for you. Mike interrogates Billy himself, squeezes out the info that Callahan never skipped town. But Billy is never going to stop hunting Mike’s family, and Mike knows it. So, he pulls the trigger himself, just like that. One more line crossed, one more bit of his soul chipped away in the Mayor of Kingstown Season 4 finale.

Kyle’s story is primarily about sorrow and anger. After the murder of his wife, Tracy, he still lives with the past and wants the killer, Callahan, to be dead before he even thinks of getting back to his child and starting life afresh. Mike sees that his brother is in a downward spiral, but at the same time knows that denying Kyle’s revenge might lead him to the path of self-destruction.

In the previous parts of the episode, Kyle gets his father’s old service revolver, and this indicates that he may be thinking about taking his own life. The Mayor of Kingstown Season 4 finale is then overshadowed by this tension, which also adds more significance to the events that follow.

Inside Anchor Bay, violence erupts once again. Kevin Jackson, that sketchy CO who can’t pick a side to save his life, goes and opens the Crips’ cellblock. Rafa and his crew go toe-to-toe with Roberto Cruz and his Colombian boys. The Crips come out on top, but Rafa gets wrecked, and Roberto walks away with just a couple of scratches.

Meanwhile, things get wild in the infirmary. Kevin Jackson thinks he is safe, but Roberto spots him. He stabs him right in the neck. You look at it, and you know that this wasn’t a random act. Hobbs probably pulled the strings, making sure the cartel’s orders got carried out. She is supposed to be the good person, but here she is, doing cartel cleanup.

Outside, Bunny is not playing around anymore. He indulges in an all-out attack on the garage of the cartel, which is now confirmed to be Cortez’s base. Bunny’s upward trajectory cannot be missed. After the arrest of Frank Moses, the Crips now share the same allegiance from Kingstown to Detroit. They kidnap Cortez, and for a moment there, Bunny is the king of the world. But then Cortez goes full psycho, murders his guards in the middle of his interrogation, and slips out. Now there’s blood everywhere and a big question mark about what’s coming next in the Mayor of Kingstown Season 4 finale.

Merle Callahan, knowing the game is up after one of his men gets kidnapped, strolls into the Kingstown PD and turns himself in. Not because he is giving up, but he figures jail is way less deadly than whatever Mike might have planned for him on the outside. He has a murder rap for Tracy hanging over his head, so he thinks, let them ship me off somewhere far from all this mess.

Captain Walter, at first, is all about “procedure.” But everyone knows Callahan just gets stronger behind bars. It’s not like prison ever slowed him down. There’s a moment where Walter wipes Callahan’s record clean and dumps him on Ian. He hands him over for some back-alley justice. Turns out, everyone has a line they will cross when the time comes.

Notably, in the Mayor of Kingstown Season 4 finale, Callahan isn’t throwing in the towel here. He is sick, he is losing his grip on the Aryan Brotherhood, but in his head, he has already won. He gutted the McLuskys emotionally, and now, dying on his own terms is his victory lap.

They drag him to the rail yard, and Mike rolls up, thinking he is going to be the one to finish this. However, Kyle steps in instead. Callahan tries trash-talking about Tracy to get under Kyle’s skin, but Kyle is not biting.

Instead of putting him down quickly, Kyle shoots him right between the legs. Now he gets a taste of that same fear and pain. As Callahan is begging, the tables finally turn for real. Kyle looks him dead in the eyes and ends it with a bullet to the head. And the big bad Aryan boss is gone just like that in the Mayor of Kingstown Season 4 finale.

Mike is there for his brother, gives him a moment, then hands the gun off to Ian. They clean up, no evidence left. Callahan dies alone, nobody shedding a tear, exactly like Kyle said he would.

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Mayor of Kingstown Season 4 finale ending explained

In the Mayor of Kingstown Season 4 finale, Callahan’s death is the closure that Mike and Kyle needed, finally patching up their relationship, maybe even pulling Kyle back from the edge. But let’s not kid ourselves, Kingstown’s peace is like duct tape on a sinking boat. The cartel is still out there, Cortez walking around, probably giving updates to his bosses. Frank Moses is behind bars, but he still has his sticky fingers in all sorts of pies.

Hobbs is in way over her head with the cartel, and her “truce” with Mike, as of the Mayor of Kingstown Season 4 finale, is hanging by a thread. Cindy is a wreck. She has got a thousand-yard stare, and you have to wonder if she is coming back to Anchor Bay or just bailing for good.

Mayor of Kingstown Season 4 doesn’t end on a heroic note. It’s just that they survive another day, barely. Mike is keeping Kingstown from falling apart, but every move makes him more enemies. Is it over? Or is this just an intermission before the next round of chaos?

For now, the war is quiet. But Kingstown never stays silent for long.

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The Mayor of Kingstown Season 4 finale is now streaming on Paramount+.