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● Movie Guide · Last updated May 18, 2026

The Woman in Cabin 10: Plot, Cast, Ending & Where to Watch

2025 · United Kingdom · Mystery, Thriller, Crime · 1h 35m · English

The Woman in Cabin 10 is a 2025 United Kingdom mystery film directed by Simon Stone. This guide covers the plot, full cast, an overview of the ending, where to watch, and similar films you might want next.

Read Ending Explained → Movies Like The Woman in Cabin 10 Where to Watch
MysteryThrillerRecommended
Original Title
The Woman in Cabin 10
Director
Simon Stone
Writers
Anna Waterhouse, Joe Shrapnel, Simon Stone
Country
United Kingdom
Runtime
1h 35m
Release
Oct 9, 2025
§ 01 Plot · 6 min read

The Woman in Cabin 10 Plot Summary

The Woman in Cabin 10 is a 2025 psychological thriller film directed by Simon Stone, who co-wrote the screenplay with Joe Shrapnel and Anna Waterhouse, based on the 2016 novel by Ruth Ware. The film stars Keira Knightley, Guy Pearce, Art Malik, Gugu Mbatha-Raw, Kaya Scodelario, Daniel Ings and Hannah Waddingham.

● Quick takeaway

The Woman in Cabin 10 (2025) is a United Kingdom mystery film, directed by Simon Stone, running 95 minutes. On a lavish yacht for an assignment, a journalist sees a passenger go overboard. But when no one believes her, she risks her life to uncover the truth. Stars Keira Knightley and Guy Pearce. Critical reception: IMDb 5.8/10, Rotten Tomatoes 29%, Metacritic 41/100. Tagline: "They don't want you to believe what she saw.." This guide covers the plot, full cast, ending, and where to watch.

§ 02 Cast · 6 roles

Cast and Characters

Keira Knightley headshot
Keira Knightley
as Laura 'Lo' Blacklock
Knightley anchors the film in the kind of close-third psychological-thriller register she has been refining since The Aftermath and Official Secrets — protagonist as both investigator and suspect-of-her-own-perceptions. Lo's anxiety disorder, her sleeplessness, the medications she is hiding from her editor, all become tools the script and the antagonists use against her, and Knightley keeps the performance from tilting into hysteria even as the film's reliability questions multiply.
Guy Pearce headshot
Guy Pearce
as Richard Bullmer
Pearce, late in a career that has run from Memento and L.A. Confidential to The Brutalist, gives Bullmer the polished surface a tech billionaire requires and the calibrated discomfort the role demands. The casting matters because Pearce can do charm and threat at the same volume; his line readings stay open enough that the audience cannot quite settle on whether his attentiveness to Lo is concern or maintenance.
David Ajala headshot
David Ajala
as Ben Morgan
Ajala, who has fronted Star Trek: Discovery and Supergirl, plays Lo's former colleague and on-board journalist with the kind of warm-but-questionable charm the closed-circle mystery genre needs as its second-most-suspicious face. Ben is an old friend, possibly an ex, certainly someone who knows Lo better than anyone else on the boat, and Ajala plays the friendship register without showing the audience which of his motives Lo should trust.
Gitte Witt headshot
Gitte Witt
as Carrie
Witt, the Norwegian actress whose international work has stretched across Vikings and Headhunters, plays one of the cruise's quieter figures with a watchfulness the film uses as a steady minor key. Carrie is the kind of supporting passenger the country-house mystery requires — peripheral enough to fade out of the audience's attention, central enough to come back into focus exactly when the script needs her to.
Art Malik headshot
Art Malik
as Dr. Robert Mehta
Malik, the British actor whose career has spanned The Jewel in the Crown, True Lies and The Crown, plays the foundation's medical consultant with the institutional calm that lets the film position Mehta as either ally or accessory without committing to either reading. The casting borrows decades of trustworthy-onscreen-doctor presence and lets the script choose what to do with it.
Gugu Mbatha-Raw headshot
Gugu Mbatha-Raw
as Rowan
Mbatha-Raw, post-Belle and Loki and The Morning Show, brings to Rowan the controlled professional grace the role requires — Bullmer's longtime adviser, someone who has built her career inside this man's orbit and who has had to make peace with what she knows about him. The performance stays composed in a way that becomes its own kind of clue, and Mbatha-Raw lets the cracks show only when the script earns them.
§ 03 · Spoiler Zone · Read with care

Ending Overview

How does The Woman in Cabin 10 end? Our spoiler-aware breakdown walks through the final act beat by beat — including the choices, motivations, and ambiguous final shot that viewers most often debate.

Read full Ending Explained →
§ 04 Watch · Updated May 18

Where to Watch The Woman in Cabin 10

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§ 06

Frequently Asked

What is The Woman in Cabin 10 about?

On a lavish yacht for an assignment, a journalist sees a passenger go overboard.

Where can I watch The Woman in Cabin 10?

See the Where to Watch section below for the current streaming, rental, and purchase options in your region.