If Only Murders in the Building were an apartment, Season 4 is the year it finally got a luxury renovation… and immediately discovered a mysterious stain
in the drywall. (Don’t worry, it’s not graphicjust emotionally suspicious.) The show’s secret sauce has always been the same: three wildly different people,
one suspiciously photogenic building, and a rotating door of famous faces that somehow feel like they actually live there.
Season 4 leans hard into that magic with a cast that’s part A-list parade, part character-actor masterclass, and part “Wait… is that really them?”
cameo bingo. The result is a season that’s as much about performance as it is about cluesbecause in this show, a perfectly timed eyebrow raise can be evidence.
Season 4’s Big Casting Trick: Hollywood Comes to the Arconia
The core hook of Season 4 is deliciously meta: the trio’s podcast success pulls them into a Hollywood orbitso the show can literally put “Hollywood actors”
inside its story while still feeling like classic Only Murders. That premise is casting catnip: it lets the series introduce major stars as themselves,
drop in industry satire, and still circle back to the Arconia’s cozy-chaotic “neighbors who may or may not be murdery” vibe.
And because Season 4’s central mystery ties to Sazz Pataki’s death, the show’s casting choices do double duty: they provide laughs, emotional weight, and
misdirection. In other words: the cast isn’t just the cast. It’s also the smoke machine.
The Core Four: The Show’s Comedy Engine (and Emotional Center)
Steve Martin as Charles-Haden Savage
Charles remains the human equivalent of a beige turtleneckquiet, classic, and unexpectedly useful in a crisis. Steve Martin plays him with that special
brand of restraint that makes every tiny reaction land. Season 4 gives Charles more grief, more fear, and more “I do not want to do this, but I will”
determinationespecially as the mystery hits close to home.
Martin Short as Oliver Putnam
Oliver is still Broadway energy in a rent-stabilized body. Martin Short continues to be the show’s loudest heartbeatdramatic, sentimental, and hilariously
incapable of acting normal for longer than eight seconds. Season 4 keeps Oliver in peak form: he’s the guy who can turn a murder board into a pitch deck
and still somehow be offended the board doesn’t clap.
Selena Gomez as Mabel Mora
Mabel is the series’ modern anchor: sharp, guarded, and allergic to nonsenseuntil she isn’t. Selena Gomez plays her with a dry, deadpan rhythm that’s
become essential to the show’s tone. Season 4 also keeps Mabel’s emotional growth in focus, letting her be both investigator and friend in a story that
constantly tests loyalty.
Michael Cyril Creighton as Howard Morris
Howard evolving into a mainstay is one of Only Murders’ smartest long games. Michael Cyril Creighton gives Howard a “slightly anxious, deeply earnest”
quality that makes him endlessly watchable. In Season 4, Howard is the kind of ally who might not be cool under pressurebut he’s committed, which is
honestly better than cool. (Cool doesn’t label evidence. Howard labels evidence.)
The A-List Guest Stars: When the Call Sheet Looks Like an Awards Show
Season 4’s guest roster isn’t just bigit’s strategically big. These stars aren’t thrown in for sparkle alone; they’re used for satire, contrast, and a
very specific kind of comedic friction: famous people trying to understand the trio’s extremely unglamorous obsession with murder logistics.
Meryl Streep as Loretta Durkin
Loretta returns with the kind of presence that makes every scene feel upgraded. Meryl Streep plays Loretta as warm, talented, and quietly complicated,
which works perfectly against Oliver’s theatrical chaos. Season 4 also uses her storyline to explore what happens when real life (and long distance)
tries to compete with Oliver’s constant need for drama and applause. Spoiler-free summary: their chemistry still sells the whole building.
Melissa McCarthy as Doreen
Melissa McCarthy’s arrival is a burst of high-voltage comedybig swings, big reactions, and the kind of timing that can turn a simple line into a full
event. The show uses her like a pressure cooker: when she enters, the scene temperature changes. That’s not just funny; it’s useful in a mystery,
because chaos is a great place to hide clues.
Eugene Levy, Eva Longoria, and Zach Galifianakis as Themselves
The “Hollywood triplets” concept is one of Season 4’s best casting ideas: three recognizable stars playing themselves while also being cast to portray
Charles, Mabel, and Oliver in a film adaptation of the podcast. That creates layers of comedybecause now you have actors studying the trio, and the trio
reacting to being studied. Eugene Levy brings gentle awkward charm, Eva Longoria plays the “I can do this, but I’m going to comment on it” confidence,
and Zach Galifianakis delivers that off-kilter vibe that makes every interaction feel slightly unpredictable.
Paul Rudd as Glen Stubbins
Paul Rudd’s Season 4 involvement is a clever extension of the series’ love of doubles, mirrors, and performance as identity. He returns not as Ben Glenroy,
but as Glen Stubbinsanother figure connected to the show’s larger “acting vs. reality” theme. Rudd’s charm is famously effortless, which makes him
especially effective in a story where you’re always wondering whether someone is sincere… or just very good at seeming sincere.
The Hidden Gems: The Westies and the Character-Actor Feast
If the A-listers are the fireworks, the “hidden gems” are the wiring that makes the whole show light up. Season 4 introduces (and spotlights) residents
connected to the Arconia’s West Toweroften called the “Westies”and this is where the casting gets sneakily brilliant. These performers can make you laugh,
make you suspicious, and make you feel something… sometimes in the same line.
Richard Kind as Vince Fish (a.k.a. “Stink-Eye Joe”)
Richard Kind is a master of the “seems harmless, might not be” energy. His West Tower presence is instantly memorable, the kind of character who could be
guilty or could simply be… a man who has lived through too many co-op board meetings. Either way, you can’t stop watching him.
Kumail Nanjiani as Rudy Thurber
Kumail Nanjiani brings a modern, camera-ready charisma that fits perfectly in a season where Hollywood is literally in the storyline. His character adds
a different rhythm to scenescooler, more curated, and exactly the type of person who might have a secret. (Or a brand partnership. Or both.)
Daphne Rubin-Vega as Inez and Desmin Borges as Alfonso
Daphne Rubin-Vega and Desmin Borges help give the West Tower a distinct identity: not just “more suspects,” but a real community with its own dynamics.
Their presence adds texture to the Arconia worldlike discovering your building has an entire neighboring wing with a totally different vibe and an even
stronger opinion about hallway etiquette.
Lilian Rebelo as Ana
One of the most satisfying things in Season 4 is how younger characters aren’t treated as decorative. Lilian Rebelo’s role adds perspective and stakes in
a way that feels grounded, especially against a season filled with industry satire and celebrity chaos.
Returning Favorites: Familiar Faces That Keep the Arconia Feeling Like Home
A big part of what makes Only Murders work is continuity. Even when the plot travels, the show never fully leaves its ecosystem. Season 4 benefits
from returning players who feel like part of the building’s DNA.
Da’Vine Joy Randolph as Detective Donna Williams
Detective Williams remains one of the show’s best “reality checks.” Da’Vine Joy Randolph gives her a weary competence that’s hilarious precisely because
she’s surrounded by amateurs who are always one espresso away from starting a conspiracy podcast about their own conspiracy podcast.
Jane Lynch as Sazz Pataki
Sazz’s presence hangs over the season, and Jane Lynch’s impact is felt even beyond straightforward screen time. The character matters because she’s tied to
Charles in a uniquely personal waymaking the mystery more emotional, not just procedural. In a show built on jokes, that emotional grounding is crucial.
Amy Ryan as Jan
When a past character returns in Only Murders, it’s rarely just fan service. Amy Ryan’s Jan is the kind of presence that instantly re-tilts the
roombecause history in this show isn’t background. It’s a living, breathing complication.
Why This Cast Works: Performance as a Clue, Not Just a Flex
Season 4 is essentially a story about storytelling. There’s a film adaptation angle, actors studying the trio, and a mystery rooted in a person whose job
was literally to perform for a living. So the casting becomes thematic: the show uses celebrity in a way that serves the plot and the humor at the same time.
- The A-listers heighten the satire: Hollywood is loud, self-referential, and always one meeting away from turning trauma into “content.”
- The Westies deepen the mystery: character actors are experts at giving you just enough truth to make you trust them… and just enough weirdness to doubt them.
- The returning ensemble keeps the tone grounded: the Arconia still feels like a real place with real relationships, not just a cameo carousel.
Critics largely responded well to this balance, noting that the star influx doesn’t eclipse the show’s core; it expands the sandbox without breaking the toys.
And that’s the key to a season like this: big casting only works if the characters still matter.
Conclusion: Season 4’s Cast Is the Mystery’s Secret Weapon
The Season 4 cast of Only Murders in the Building is a carefully built machine: the headliners bring the heart, the A-listers bring the sparkle,
and the hidden gems bring the texture that makes the Arconia feel like a real (slightly cursed) home. It’s a season where celebrity doesn’t distract from
the mysteryit becomes part of the mystery’s language.
If you’re watching for laughs, you’ll get them. If you’re watching for clues, you’ll get those too. And if you’re watching to shout “WAIT, THAT’S RICHARD KIND!”
at your TV, Season 4 is basically a personalized wellness plan.
Extra: of “Watching Experiences” with This Season 4 Cast
There’s a very specific experience that happens when you watch a show like Only Murders in the Buildingespecially a season like this onewhere your
brain splits into two people. One is a serious detective with a mental clipboard. The other is a delighted gremlin who keeps whispering, “Is that… is that
really them?” Season 4’s cast turns that split into part of the fun.
The viewing rhythm becomes a game. In one scene, you’re emotionally invested in Charles processing loss; in the next, you’re trying to decide whether a line
delivery is a clue or just someone being hilariously strange. Because Season 4 leans into Hollywood, it also changes how you interpret everything. When actors
(playing themselves) show up to “research,” the show encourages you to notice behavior like you’re studying a performance. Who’s acting? Who’s sincere?
Who’s performing sincerity? It’s like watching a mystery while also watching a behind-the-scenes featurette that might be lying to you.
The A-list guest stars also create a social viewing effect. If you watch with friends, this season practically invites pauses. Someone will say, “WaitEva
Longoria is playing herself?” and suddenly you’re in a five-minute sidebar about how the show keeps using fame as a plot device. That’s not a bug;
it’s a feature. Season 4 is built to be talked about, and the casting is the gasoline. You don’t just watch the mysteryyou debate it, recast it in your head,
and then argue over whether the West Tower neighbor is “definitely guilty” or “just New York weird.”
The hidden gems deepen the experience in a different way: they make rewatching rewarding. On a first pass, you might clock a Westie as “suspicious.”
On a second pass, you realize the actor is quietly doing something more layeredhinting at fear, loneliness, pride, or irritation that feels painfully real.
That’s when the show’s casting shows its best trick: it can make you laugh at someone and then, two episodes later, make you care about them. A good
character actor can turn a hallway conversation into a whole backstory, and Season 4 is full of those moments.
And then there’s the fandom experience: the week-to-week clue hunting. Season 4’s guest-heavy cast is perfect for theory culture because everyone feels
“important enough” to be involved. Viewers end up building suspect lists the way other people build fantasy football rosters. Who’s in the episode?
Who’s missing? Who’s getting too many close-ups? When a show has this many recognizable faces, you start reading screen time like tea leaves.
That’s why the season is so sticky: it doesn’t just entertain you; it recruits you. You’re not only watching the castyou’re auditioning to be the fourth
member of the trio, armed with nothing but vibes, screenshots, and a slightly concerning commitment to the corkboard lifestyle.
