Watch War on HBO: Dominic West in Britain's biggest divorce
Dominic West stars as tech mogul Morgan Henderson in HBO's new legal drama War, which premieres Thursday, Oct. 1 at 9 p.m. The eight-episode series centers on what NPR calls the biggest divorce trial in British legal history, pitting West against Sienna Miller's movie star Carla Duval.
Key Takeaways
- Dominic West plays tech CEO Morgan Henderson opposite Sienna Miller's Carla Duval in George Kay's HBO legal drama War.
- Season one follows rival London firms Cathcarts and Taylor & Byrne through an obscenely expensive celebrity divorce.
- The series airs Thursdays at 9 p.m. on HBO starting Oct. 1, 2026, with eight elegantly paced episodes.
- Kay drew inspiration from 1990s shows like The West Wing and Ally McBeal for zip and repartee.
- Miller and West previously shared a West End stage in As You Like It more than two decades ago.
For readers who follow courtroom intrigue and scandal-driven storytelling, this premiere sits squarely in BlasterPost's True Crime & Unsolved Mysteries coverage of high-stakes legal battles.
What is HBO's War about and why does Dominic West matter?
Created by George Kay of Lupin and Hijack, War tracks two of London's most prestigious rival firms as they clash over a headline-grabbing split. Dominic West's Morgan is a tech mogul whose fortune sits somewhere between hundred-millionaire and billionaire, depending on who is asking and why.
Sienna Miller's Carla is an international film star who, in the premiere's opening minutes, springs a honey trap to prove his infidelity. A bedroom selfie from Rose Williams' Flora becomes the final straw that pushes her to file. According to The Hollywood Reporter, the season is addictively juicy courtroom combat rather than solemn tragedy.
How dirty does the divorce battle get?
Carla's solicitors Nick and Serena of upstart firm Taylor & Byrne are aghast at the honey trap—mostly over optics—while Morgan's Cathcarts team, led by Pip Torrens' St. John and Nina Sosanya's Beatrice, are delighted for the same reasons. Tricks pile up on both sides by season's end.
Air Mail notes a scene that eerily recalls how Olivia Wilde was served custody papers by Jason Sudeikis: Carla is handed divorce papers by Morgan at the premiere of her new film. The theatrics of celebrity divorce are the point. Kay told The Guardian he wanted the zip and repartee of glossy 1990s television.
Supporting players include Archie Renaux as ambitious junior lawyer Johnny, Phoebe Fox, James McArdle, Miles Jupp, and Aran Murphy as Carla's 16-year-old son Gabe. Director Ben Taylor frames the airy blue-steel offices of Taylor & Byrne against Cathcarts' dim mahogany rooms.
When can you watch War on HBO?
War premieres Thursday, Oct. 1, 2026, at 9 p.m. on HBO. NPR's Leila Fadel spoke with Dominic West about playing the wealthy husband locked in what the series frames as the biggest divorce trial in British legal history. Over two decades after leading a West End As You Like It, Miller and West return as bitter onscreen rivals.
Critic Angie Han credits Kay's command of pacing and twisty entertainment, even when deeper themes about money, gender double standards, and celebrity tabloid culture stay secondary. The takeaway for viewers: War swears by compulsion over moral righteousness—and Dominic West's rumpled arrogance is central to the ride.