WAR (2026) is a legal drama series created by George Kay, the writer behind Lupin and Hijack. Starring Dominic West, and Archie Renaux, the series explores the ruthless world of London's leading lawyers, where professional ambition, personal betrayal and courtroom battles collide. Produced by New Pictures and Observatory Pictures in association with Sky and HBO, the drama brings a high-profile divorce case to the centre of a fierce rivalry between two prestigious law firms.
The first season consists of eight episodes and premiered on HBO on 1 October 2026. In the UK, the series launched on Sky and NOW on 2 October 2026. WAR has also been commissioned for a second season, which will introduce a different legal dispute.
WAR (2026): Series Overview
AttributeDetailsTitleWARRelease year2026GenreLegal drama, thrillerCreatorGeorge KayLead directorBen TaylorLead castDominic West, Sienna Miller, Archie RenauxCountryUnited KingdomLanguageEnglishSeason 1 episodes8Premiere date1 October 2026 (HBO)UK release2 October 2026Original networksHBO and SkyStreaming platformHBO Max; Sky and NOW in the UKProduction companiesNew Pictures and Observatory PicturesSeason 2ConfirmedWhat Is WAR (2026) About?
The story of WAR begins with the collapse of a seemingly powerful marriage. Morgan Henderson, a successful technology entrepreneur, discovers that his private life is about to become a very public problem. His estranged wife, Carla Duval, is an internationally recognised film star who refuses to let their separation unfold quietly.
Their divorce becomes a high-profile legal confrontation, with enormous financial interests and personal reputations at stake. Two rival London law firms, Cathcarts & Sons and Taylor & Byrne, take opposing sides, transforming a marriage breakdown into a fierce professional contest.
For the lawyers, the case represents far more than a dispute between two wealthy clients. Every decision could influence their careers, damage their relationships or expose secrets they would prefer to keep hidden. The pursuit of victory gradually tests the boundaries between legal strategy, personal loyalty and ethical responsibility.
The drama also follows Johnny Warren, an ambitious young lawyer who becomes involved in the case. As he navigates the competitive legal world, he must decide how far he is willing to go to establish himself in a profession where success can come at a considerable personal cost.
WAR (2026) Cast and Characters
The series features an ensemble cast, with experienced performers portraying powerful clients, ambitious lawyers and professionals caught between competing interests.
Dominic West as Morgan Henderson
Dominic West plays Morgan Henderson, a wealthy technology entrepreneur who built his fortune through the social media platform Zephyr. Confident, ambitious and accustomed to controlling events, Morgan approaches his divorce with the same determination he brings to business.
However, the legal battle challenges his ability to control the narrative surrounding his private life. West's performance anchors the story around a man whose wealth and influence cannot necessarily protect him from the consequences of his personal decisions.
Sienna Miller as Carla Duval
Sienna Miller portrays Carla Duval, a successful international film star whose marriage to Morgan reaches a breaking point.
Behind her public image, Carla struggles with the emotional consequences of a relationship that has left her feeling neglected. Determined to protect her interests, she turns to Serena Byrne and her legal team as the divorce becomes increasingly hostile.
Carla is not simply a celebrity seeking financial compensation. Her character adds an emotional dimension to the conflict, raising questions about trust, independence and the price of maintaining a public identity.
Archie Renaux as Johnny Warren
Archie Renaux plays Jonathan “Johnny” Warren, a young lawyer seeking to rebuild his professional reputation.
Drawn into a major legal dispute, Johnny sees an opportunity to demonstrate his ability and advance his career. Yet the pressures surrounding the case force him to confront the difference between achieving success and making the right decisions.
His journey provides a perspective on the legal profession from someone still learning how its power structures operate.
Phoebe Fox as Serena Byrne
Phoebe Fox plays Serena Byrne, a founding partner of Taylor & Byrne. Ambitious and determined, Serena established her firm after leaving a more traditional legal environment.
She believes in building strong relationships with clients, but her emotional investment can complicate difficult professional decisions. The Henderson–Duval case becomes a major test of her leadership, judgment and ability to balance professional ambitions with family responsibilities.
James McArdle as Nicholas Taylor
James McArdle portrays Nicholas Taylor, Serena's husband and business partner.
Practical and measured, Nicholas often provides a counterbalance to Serena's more instinctive approach. Their relationship combines personal affection with the pressures of running a competitive law firm.
As the case develops, Nicholas faces challenges that threaten both his professional confidence and his partnership with Serena.
Other Cast Members
Additional performers bring depth to the legal teams and the wider story:
Nina Sosanya as Beatrice “Queen Bea” Ubosi — a respected partner at Cathcarts & Sons.
Pip Torrens as St John Smallwood — Morgan's lawyer and a formidable legal opponent.
Celia Imrie as Joy “Budgie” Budge — an experienced barrister associated with Taylor & Byrne.
Nick Mohammed as Michael Stefanou — a senior associate at Taylor & Byrne.
Emma Laird as Molly Giordano — a trainee associate eager to prove herself.
Archie Panjabi as Prudence Mutti — a highly regarded barrister.
Adrian Scarborough — a member of the wider cast.
Shaheen Jafargholi as Saeed Masood — an ambitious member of the legal team.
Together, the cast creates a broad picture of the rivalries, ambitions and personal relationships surrounding a major legal case.
WAR (2026) Trailer: What to Expect
The official trailer introduces a world in which personal scandals quickly become professional opportunities. The breakdown of Morgan and Carla's marriage sets the stage for a legal confrontation, while the rival firms prepare to fight aggressively for their clients.
The preview emphasises the show's central themes: ambition, betrayal, competition and the pressure to win. It also introduces Johnny Warren's position within this environment, suggesting that the case could have consequences well beyond the courtroom.
Rather than presenting the series as a conventional courtroom procedural, the trailer highlights the private tensions behind the legal strategies. Relationships between colleagues, business partners and clients become just as important as the arguments presented in court.
Release Date and Episode Details
WAR premiered on HBO in the United States on 1 October 2026, with subsequent episodes scheduled for weekly release on Thursdays. The UK premiere on Sky and NOW followed on 2 October 2026.
The first season contains eight episodes, allowing the series to develop the divorce case while exploring the professional and personal lives of the lawyers involved.
As the story progresses, the conflict between Cathcarts & Sons and Taylor & Byrne creates opportunities for shifting alliances, strategic manoeuvres and unexpected revelations.
Where to Watch WAR (2026)
The series is distributed across HBO and Sky's regional platforms.
United States: HBO and HBO Max.
United Kingdom: Sky Atlantic and NOW.
Other international markets: Availability varies by country and local licensing arrangements.
Viewers in India should check the current HBO Max or other licensed streaming catalogues available in their region. A title's availability in the United States or United Kingdom does not guarantee that it can be streamed in India.
For official information, visit the HBO Max website or Sky's WAR series page.
Will WAR Return for Season 2?
Yes. HBO and Sky commissioned two seasons of WAR, with the second season planned around a new legal dispute rather than a continuation of the first season's divorce case.
The next instalment is set to feature Marisa Tomei, Kelly Macdonald and David Harewood. Its story will centre on a high-profile defamation case, extending the series' exploration of legal power, reputation and professional rivalry.
This format gives the drama room to introduce new clients and conflicts while retaining its broader focus on the competitive world of elite law firms.
Final Verdict
WAR (2026) combines a celebrity divorce, a technology billionaire's personal crisis and a fierce rivalry between two prestigious law firms. Its ensemble cast, led by Dominic West and Sienna Miller, brings together personal drama and professional competition in a story about the consequences of ambition.
For viewers who enjoy character-driven legal thrillers, workplace rivalries and high-stakes disputes, WAR offers a drama in which the fight for victory extends far beyond the courtroom.