Only Murders in the Building Season 5 officially premiered on September 9, 2025, on Hulu. As one of the most anticipated returns in the mystery-comedy genre, the fifth installment followed the beloved trio—Charles-Haden Savage, Oliver Putnam, and Mabel Mora—as they navigated a new, high-stakes investigation within the hallowed (and increasingly dangerous) halls of the Arconia.

After the dramatic Hollywood-centric events of the fourth season, Season 5 brought the narrative back to the streets of New York City, specifically focusing on the mysterious death of a long-standing Arconia fixture: the doorman, Lester. The season consisted of 10 episodes, maintaining the show's signature blend of sharp wit, poignant character moments, and intricate "whodunnit" puzzles.

Official Premiere and Release Timeline on Hulu

The rollout for Season 5 followed a strategic release pattern designed to keep the audience engaged throughout the autumn of 2025. On the premiere date of September 9, 2025, Hulu released the first three episodes simultaneously, allowing fans to dive deep into the initial mystery. Subsequent episodes were released weekly every Tuesday, concluding with an explosive season finale on October 28, 2025.

For international audiences, the series was made available on Disney+ under the Star banner, following the same weekly schedule. This synchronized global release ensured that the podcast-solving community could discuss clues in real-time without the risk of spoilers crossing borders.

Weekly Episode Breakdown

  • Episode 1: "Nail in the Coffin" – September 9, 2025
  • Episode 2: "After You" – September 9, 2025
  • Episode 3: "Rigor" – September 9, 2025
  • Episode 4: "Dirty Birds" – September 16, 2025
  • Episode 5: "Tongue Tied" – September 23, 2025
  • Episode 6: "Flatbush" – September 30, 2025
  • Episode 7: "Silver Alert" – October 7, 2025
  • Episode 8: "Cuckoo Chicks" – October 13, 2025
  • Episode 9: "L.E.S.T.R." – October 21, 2025
  • Episode 10: "The House Always..." – October 28, 2025

Complete Season 5 Episode Guide and Plot Summaries

The narrative arc of Season 5 is widely considered one of the series' most grounded yet complex journeys. By centering the victim on someone the characters—and the audience—had seen in the background for years, the stakes felt deeply personal.

The Initial Discovery (Episodes 1-3)

The season kicks off on the day of Lester's funeral. While the police initially rule his death an accident, Charles, Oliver, and Mabel suspect foul play after discovering a severed finger in a shrimp tower ordered for Oliver's wedding. This gruesome find leads them to Staten Island, where they encounter the Caccimelio family, a notorious mob syndicate with deep ties to the Arconia's dry cleaning business.

In Episode 2, "After You," the show utilizes a beautiful non-linear narrative to explore Lester’s history. We see a young Lester starting at the Arconia in 1993, mentored by an older doorman named George. The episode reveals that the Arconia has always harbored secrets, including a "commission" system where doormen were paid by mobsters to look the other way.

By Episode 3, "Rigor," the trio is performing their own unauthorized autopsy on a second body—that of mobster Nicky Caccimelio—which Oliver accidentally hid in Charles's apartment. The discovery of a magnetic poker card containing a hidden map of a secret casino beneath the Arconia shifts the investigation into high gear.

Billionaires and Libel (Episodes 4-6)

Mid-season, the investigation takes a turn toward the ultra-wealthy. In "Dirty Birds," the trio interrogates a group of billionaires, including pharmaceutical heir Jay Pflug, tech mogul Bash Steed, and hotelier Camila White. The trio suspects Jay because he is missing a finger, but the mystery deepens when they realize the finger they found does not match his.

The tension peaks in Episode 5, "Tongue Tied," when the Arconia introduces a robotic doorman called L.E.S.T.R. (Logic Engineered Secure Tenant Robot). The automation of the building's security causes a riot among the human staff, and the trio realizes that the robot might be recording more than just security footage.

Episode 6, "Flatbush," takes Oliver back to his childhood roots. While investigating the widows of Lester and Nicky, Oliver and Loretta confront buried memories that provide the missing link between the secret casino and the current murders.

The Final Stretch (Episodes 7-10)

As the season approaches its climax, "Silver Alert" sees the Mayor of New York, Beau Tillman, warning the trio to drop their investigation. This "friendly" warning serves as a massive red flag. The penultimate episode, "L.E.S.T.R.," reveals that the robot doorman holds the final piece of digital evidence needed to identify the killer.

The finale, "The House Always...", brings all the threads together in a classic showdown. The trio discovers that the murders weren't just about mob debts, but about a massive real estate conspiracy involving the sale of the Arconia itself.

New and Returning Cast Members in Season 5

One of the hallmarks of Only Murders in the Building is its ability to attract A-list talent for guest roles, and Season 5 was no exception. The core chemistry between Steve Martin, Martin Short, and Selena Gomez remained the heartbeat of the show, but the supporting ensemble added fresh layers of intrigue.

The Core Trio

  • Steve Martin as Charles-Haden Savage: This season, Charles dealt with the psychological aftermath of Sazz Pataki's death from the previous season, finding solace in the meticulous nature of the Lester investigation.
  • Martin Short as Oliver Putnam: Oliver’s storyline was heavily tied to his new marriage and his anxieties about aging, all while he attempted to turn their latest investigation into a high-concept Broadway pitch.
  • Selena Gomez as Mabel Mora: Mabel continued to be the grounding force, navigating her complicated friendship with a newly famous pop star, Althea, while managing the trio's deal with the podcasting giant Wondify.

The A-List Guest Stars

  • Renée Zellweger as Camila White: Playing a ruthless hotelier with a penchant for high-stakes gambling, Zellweger brought a sharp, intimidating energy to the screen.
  • Christoph Waltz as Sebastian "Bash" Steed: As a tech mogul with questionable ethics, Waltz portrayed a character who was simultaneously charming and terrifying.
  • Keegan-Michael Key as Mayor Beau Tillman: Key played the seemingly affable mayor whose involvement in the Arconia's secrets proved to be the season's biggest twist.
  • Téa Leoni as Sofia Caccimelio: Returning to her role as the mob wife who first approached the trio, Leoni provided the necessary bridge to the underworld.
  • Meryl Streep as Loretta Durkin: Continuing her role as Oliver's love interest, Streep’s character provided emotional depth as she supported Oliver through the chaos of the investigation.

Explaining the Season 5 Finale and the Mystery of Lester

The reveal in the Season 5 finale was both shocking and structurally sound. Throughout the season, the trio believed that the Caccimelio mob family was responsible for Lester’s death. However, the truth was far more political.

Mayor Beau Tillman was revealed as the killer. The motive stemmed from Lester’s ledger—a document the doorman had kept for decades, detailing every illegal entry, bribe, and secret meeting within the Arconia. The Mayor, who had climbed the political ladder through corrupt deals made within the Arconia’s secret casino, couldn't afford to have that ledger go public.

When Lester tried to retire and take his ledger with him, Tillman intervened. The "accidental" death in the fountain was a calculated move to silence the man who knew too much about the city's power players. The severed finger found in the shrimp tower belonged to Nicky Caccimelio, whom the Mayor had also killed to prevent a mob-related exposure of his gambling debts.

The season ended with a bittersweet victory. While the trio solved the case and saved the Arconia from a hostile takeover by the billionaires, the building's sense of security was permanently shattered. This set the stage for the next chapter of their lives.

What We Know About Only Murders in the Building Season 6

The conclusion of Season 5 immediately paved the way for Season 6. In the final moments of the finale, a new mystery was teased, but with a massive twist: the action is moving across the pond.

Showrunner John Hoffman confirmed that Season 6 will take place in London. Described as the "sister city to New York," London offers a fresh backdrop for the trio's podcasting adventures. The move is sparked by a murder involving a British contact linked to the Caccimelio family’s international business interests.

The renewal for Season 6 was announced by Hulu just hours after the Season 5 premiere, signaling the network's immense confidence in the series. Fans can expect the same blend of humor and mystery, but with a distinct British flair and likely a whole new roster of UK-based guest stars.

Summary of Season 5 Highlights

Season 5 of Only Murders in the Building succeeded by returning to the show’s roots—the Arconia itself. By focusing on Lester the doorman, the series paid homage to the "invisible" people who make the building function.

The season excelled in several key areas:

  1. Narrative Depth: The exploration of the secret casino and the building's historical corruption added layers to the Arconia's lore.
  2. Character Growth: Mabel’s struggle with fame and Charles’s journey through grief provided emotional weight.
  3. Technological Satire: The introduction of the L.E.S.T.R. robot served as a hilarious yet biting commentary on the automation of modern life.
  4. The Twist: Moving away from the "obvious" mob suspect to a political villain kept the audience guessing until the very end.

Frequently Asked Questions (FAQ)

When did Only Murders in the Building Season 5 come out?

Season 5 premiered on September 9, 2025, on Hulu and Disney+.

How many episodes are in Season 5?

There are 10 episodes in Season 5, following the standard format of the previous four seasons.

Who is the killer in Only Murders in the Building Season 5?

The killer was revealed to be Mayor Beau Tillman, played by Keegan-Michael Key. He murdered Lester to prevent the doorman’s secret ledger from exposing his corrupt past.

Will there be a Season 6 of Only Murders in the Building?

Yes, the series has been officially renewed for Season 6, and the story will move from New York City to London.

Where can I watch Only Murders in the Building Season 5?

You can stream all episodes of Season 5 on Hulu in the United States and on Disney+ internationally.

Who died at the start of Season 5?

The primary victim of Season 5 was Lester, the long-time doorman of the Arconia building. His death was initially staged to look like an accident in the building's fountain.

Is Meryl Streep in Season 5?

Yes, Meryl Streep returned as Loretta Durkin, continuing her storyline as Oliver Putnam's partner and a successful actress.