This season has been fueled by betrayal, grief, and nonstop violence, and the finale brings all of it crashing together in the ugliest way possible.
Mike McLusky, played by Jeremy Renner, has spent the season making impossible choices. One of his biggest moves was arranging the arrest of Frank Moses to secure the release of his brother Kyle. But freedom doesn’t bring peace for Kyle. Instead, it leads him straight into despair after his wife Tracy is brutally murdered by Callahan, an Aryan gang leader enraged by Kyle’s refusal to join him.
Kyle’s pain hangs over the entire finale. He’s a cop in prison, surrounded by enemies, and Callahan has spent months trying to break him psychologically. Tracy’s murder becomes the final blow, pushing Kyle to the edge.
Callahan’s End, and Kyle’s Breaking Point
The episode opens with Mike, Kyle, and Ian narrowly surviving a hit by masked gunmen. They capture and torture one attacker, learning just enough to know that Callahan is still nearby. Mike and Ian are determined to reach him before the police do, believing prison would never be punishment enough.
Callahan, sensing what’s coming, turns himself in. But even inside the station, the system bends. Captain Walter decides Callahan is beyond the law’s reach and quietly lets Ian take him away, knowing exactly what will happen next.
At the railyard, Callahan continues to taunt Mike, insisting his death won’t bring peace. Mike doesn’t pull the trigger. Instead, he gives that moment to Kyle.
Kyle arrives, emotionally shattered but focused. When Callahan mocks Tracy’s murder one last time, Kyle shoots him in the groin, then calmly finishes the job with a bullet to the head — and several more for good measure. It’s brutal, raw, and deeply personal.
When it’s over, Kyle collapses into Mike’s arms. The revenge he needed doesn’t bring relief, only grief.
War Inside and Outside the Prison
While Callahan meets his end, Kingstown itself explodes.
The long-simmering war between the Crips and the Colombians finally ignites. Bunny rallies his forces both inside the prison and on the streets, aligning with Detroit allies to wipe out the Colombian operation. Mike convinces the new warden, Nina Hobbs, to lift the prison lockdown, knowing full well it will lead to bloodshed.
Inside the prison, chaos erupts. Shivs flash, bodies drop, and Kevin — a guard who secretly helped the Crips — is murdered, paying the ultimate price for choosing a side.
Outside, Bunny’s crew attacks the Colombians’ headquarters and captures Cortez, their ruthless hitman. He escapes, killing several Crips and reminding everyone that the fight for Kingstown’s power is far from over.
Power Shifts, But Nothing Is Settled
By the end of the finale, the Crips appear to have the upper hand. Frank Moses is behind bars. Callahan is dead. The Colombians are weakened.
But stability is still a lie.
Cortez is free and dangerous. Frank may still pull strings from prison. And Mike remains stuck in his role as Kingstown’s reluctant fixer, trying to hold together a city that seems determined to tear itself apart.
A Finale Without Winners
The season 4 finale doesn’t offer comfort or closure. It delivers something harsher and more honest: justice in Mayor of Kingstown is never clean, never fair, and never free.
Kyle gets revenge, but loses a piece of himself. Mike keeps the city from burning — for now — at the cost of more blood on his hands. And Kingstown moves forward, scarred, violent, and waiting for the next war.
Mayor of Kingstown is now streaming on Paramount+.
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