5 Shocking Twists That Defined Only Murders In The Building Season 5: Killer Revealed And The New Victim For Season 6

The Arconia’s latest chapter has closed, but the podcast is far from over. As of this current date, December 12, 2025, the fifth installment of the beloved Hulu mystery-comedy, Only Murders in the Building, has officially concluded, leaving fans both satisfied with the resolution of Lester Coluco’s murder and completely stunned by the cliffhanger that sets up Season 6. The season, which premiered on September 9, 2025, delivered a new, emotionally charged case involving a beloved Arconia figure, culminating in a shocking finale that unmasked a killer with a motive tied to the very foundation of the iconic building.

The latest ten-episode run saw Charles, Oliver, and Mabel—the iconic trio—investigate the brutal death of the building’s longtime doorman, Lester. This season was a masterful blend of dark comedy and genuine emotional depth, forcing the podcasters to confront their own futures and the fate of their beloved home. The information below details the entire Season 5 arc, including the killer's identity, the motive, and the major setup for the next mystery.

The Star-Studded Cast: Only Murders in the Building Season 5 Profiles

Season 5 maintained the show's tradition of combining its powerhouse lead trio with an incredible lineup of recurring and guest stars, many of whom became key suspects in the Lester Coluco murder case. The following list details the main and most notable supporting players who shaped the season’s narrative.

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• Steve Martin as Charles-Haden Savage: The semi-retired actor and co-host, who faced new personal challenges and a deepening bond with his co-hosts.
• Martin Short as Oliver Putnam: The flamboyant and often financially-strained theater director, whose relationship with Loretta (Meryl Streep) continued to evolve.
• Selena Gomez as Mabel Mora: The sharp, artistic co-host who wrestled with her future, her career, and the constant pull of the Arconia's mysteries.
• Teddy Coluca as Lester Coluco: The victim of the season, the Arconia's longtime, grumpy-but-beloved doorman, whose murder kicks off the investigation.
• Recurring Guest Stars & Key Entities:
  • Téa Leoni: A major celebrity cameo whose role was pivotal to the plot's twists.
  • Bobby Cannavale: A returning figure or new character integral to the investigation.
  • Keegan-Michael Key: Another high-profile guest star adding to the suspect pool.
  • Dianne Wiest: A cameo performance that added complexity to the Arconia residents.
  • Beanie Feldstein: A notable appearance that further fleshed out the world of the Upper West Side.
  • Beau: The character ultimately revealed as Lester's killer.
  • Cinda Canning: The rival true-crime podcaster, whose fate becomes the focus of the Season 6 mystery.

The Shocking Solution: Who Killed Lester Coluco and Why?

The central mystery of Season 5 revolved around the tragic death of Lester Coluco, the Arconia doorman. The investigation took the trio through multiple red herrings, hidden rooms, and a complex web of resident secrets, but the true killer was finally unmasked in the dramatic season finale on October 28, 2025.

The Killer's Identity Revealed

In a tense climax, the trio discovered that the murderer of Lester Coluco was Beau. Beau was an unexpected suspect, whose connection to the Arconia's fate provided the shocking motive. The reveal was classic OMITB, mixing high-stakes drama with a touch of the absurd.

The Motive: The Arconia's Dark Fate

The motive for Lester’s murder was intrinsically tied to the financial and structural future of the Arconia itself. The killer’s goal was to silence Lester, who had discovered a massive corruption scheme related to the building. The ultimate plan was to have the Arconia demolished to make way for a casino. After his confession, Beau attempts to trap Charles, Oliver, and Mabel in a hidden room, intending to bury them alive during the demolition. This plot point not only solved the murder but also placed the Arconia in existential peril, adding enormous stakes to the finale.

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The Final Twist: Setting Up the Only Murders in the Building Season 6 Mystery

As is tradition for the series, the resolution of one murder immediately gave way to the introduction of the next, setting the stage for the highly anticipated Season 6. The final moments of the Season 5 finale delivered a shocking new victim, ensuring the podcast—and the show—will continue.

The Next Victim: Cinda Canning

The new murder victim is none other than the rival true-crime podcast superstar, Cinda Canning. This twist is monumental, as Cinda has been a recurring antagonist and a professional foil to the trio since Season 1. Her death, which occurs outside the Arconia, raises immediate questions about the scope of the new investigation. While Cinda’s murder is a shocking development, some critics have noted that moving the central crime away from the Arconia—the "only murders in the building"—is a growing trend for the series.

The London Rumor for Season 6

Adding to the intrigue, there has been significant speculation that the new Cinda Canning case might take the trio across the Atlantic. Rumors and teases suggest that Only Murders in the Building Season 6 could be headed to London. This potential international setting would be a massive departure from the Arconia and New York City, opening up a whole new world of suspects, celebrity cameos, and cultural satire for Charles, Oliver, and Mabel to navigate. The show’s renewal for a sixth season was officially announced the day of the Season 5 finale, October 28, 2025, confirming the continuation of the series.

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Topical Authority: Key Entities and Themes of Season 5

Season 5 explored several deep themes and introduced key entities that enriched the show’s topical authority beyond the central murder mystery. The focus on the Arconia's financial instability and potential demolition introduced a powerful new antagonist: the threat of corporate greed and gentrification.

• The Arconia's Fate: The building itself became a character in peril, with the threat of demolition serving as the overarching tension for the season.
• Lester Coluco's Backstory: The season delved into the life of the Arconia doorman, providing emotional context for his murder and highlighting the often-unseen lives of service workers.
• Oliver and Loretta's Relationship: The romance between Oliver Putnam and Loretta Durkin (Meryl Streep) was a major emotional arc, with their relationship reaching a significant milestone.
• The Trio’s Future: Mabel, Charles, and Oliver all faced decisions about their individual careers and whether the podcast was a sustainable future for them, adding a reflective layer to the comedy.

The resolution of the Lester Coluco case was satisfying, yet the shocking death of Cinda Canning and the potential move to London for Season 6 ensures that the Arconia's beloved podcasters will be back on the case, trading their Upper West Side haunts for a new international whodunit.