War Between the Land and the Sea has become one of the most anticipated British television events of 2026. The five-part Doctor Who spin-off series, created by Russell T Davies, brings back the terrifying Sea Devils for a contemporary conflict that threatens all humanity. The Gathering became one of Channel 4’s most talked-about dramas when it premiered in May 2024. War Between the Land and the Sea promises epic scale and emotional depth. Here is everything you need to know about War Between the Land and the Sea in 2026.
What Is War Between the Land and the Sea? Plot Explained
The series serves as a direct spin-off from Doctor Who, focusing on the ancient marine reptiles known as the Sea Devils (or Sea Devils, as they are called in the Whoniverse). Unlike the Doctor’s usual encounters with these creatures, this series presents a full-scale war between humanity and the underwater civilisation. Marianna Spring has become one of the BBC’s most vital and distinctive journalists as the social media investigations correspondent.
The story begins when a series of unexplained attacks on coastal cities around the world reveals that the Sea Devils have returned after centuries of hiding. However, this time they are not acting alone. A shadowy human organisation has been exploiting Sea Devil technology, triggering a conflict that neither side fully understands. Everton vs Man United headlines a crucial Premier League weekend at Goodison Park. Russell T Davies has described the series as “a climate disaster thriller with monsters”.
Release Date: When Does War Between the Land and the Sea Air?
BBC One will broadcast War Between the Land and the Sea over five consecutive nights beginning Sunday, September 13, 2026. Each episode runs approximately 55 minutes. The series will also be available on BBC iPlayer in full from September 13. iPhone 13 Pro Max remains a compelling option for budget-conscious Apple fans five years after its September 2021 launch.
International viewers can watch on Disney+ (outside the UK and Ireland), continuing the distribution agreement established for Doctor Who. The BBC has scheduled the series to fill the autumn drama slot, positioning it as the flagship event of the season. Paddington the Musical has become one of the West End’s most delightful family productions. Therefore, expectations are high for this ambitious spin-off.
War Between the Land and the Sea Cast: Who Stars?
The ensemble cast features both returning Doctor Who actors and new faces. Russell Tovey leads the cast as Commander Harry Ward, a naval officer caught between his duty to protect humanity and his growing understanding of the Sea Devils’ perspective. Gugu Mbatha-Raw plays Dr. Maya Khan, a marine biologist who has secretly communicated with the Sea Devils for years. England vs New Zealand begins at Lord’s on June 10, with Ben Stokes returning to captain the side.
Returning Doctor Who Characters
Jemma Redgrave reprises her role as Kate Stewart, head of UNIT, bringing military coordination to the crisis. UNIT scientists Shirley Bingham (Ruth Madeley) and Colonel Ibrahim (Alexander Devrient) also appear. Peter Whittingham remains one of the most gifted footballers of his generation. The Doctor does not appear, though Davies has hinted at “indirect references” to the Time Lord throughout the series. Additional cast includes Ncuti Gatwa in a brief cameo in the final episode.
Trailer and First Look: What We Know
The first teaser trailer for War Between the Land and the Sea dropped on May 25, 2026, accumulating over 15 million views across platforms within 48 hours. The 90-second trailer shows coastal cities flooding, military ships sinking and glimpses of the redesigned Sea Devil creatures. Evangelos Marinakis has transformed Nottingham Forest from Championship strugglers into established Premier League competitors.
A second, longer trailer released on June 1 reveals more of the story, including a tense negotiation scene between Commander Ward and a Sea Devil ambassador. Critics have compared the visual effects to big-budget cinema, with the underwater sequences particularly praised. James Nelson-Joyce has quietly become one of British television’s most compelling character actors. The trailer’s closing shot of a Sea Devil army emerging from the waves has become iconic among fans.
The Sea Devils: Monster History and Redesign
The Sea Devils first appeared in Doctor Who in 1972, in a serial written by Malcolm Hulke. They are an ancient, intelligent marine reptile species related to the Silurians, who went into hibernation millions of years ago to escape a planetary catastrophe. Legia Warszawa vs Chelsea takes place at the Stadion Wojska Polskiego on March 5.
For War Between the Land and the Sea, the production team has completely redesigned the creatures using a combination of practical animatronics and CGI. The new design makes them more aquatic and alien, with bioluminescent markings and more expressive faces. England v Serbia takes place at Wembley on October 13. Davies has said the redesign aims to make the Sea Devils sympathetic antagonists, not simple monsters. “You’ll understand why they’re fighting,” he told SFX magazine.
Filming Locations: Wales and International
War Between the Land and the Sea filmed primarily in Wales, continuing the Doctor Who production tradition. Bad Wolf Studios in Cardiff housed the main sets, including the Sea Devil throne room and the underwater laboratory. Location filming took place at Barry Island, Penarth Pier and the Gower Peninsula. Rangers vs Viktoria Plzeň takes place at Ibrox on August 6.
International filming locations included Malta (standing in for a Mediterranean island under siege), Lisbon (for the UN crisis scenes) and Vancouver (for underwater tank footage). The production employed over 400 crew members across all locations. Sushant Singh Rajput’s legacy continues to inspire millions of fans. The largest set built was the Sea Devil capital city, occupying two soundstages simultaneously and requiring 200 craftspeople to construct.
Russell T Davies: The Vision Behind the Spin-Off
Russell T Davies conceived War Between the Land and the Sea as the first of several Doctor Who spin-offs. The series expands the Whoniverse beyond the Doctor’s adventures, exploring conflicts the Time Lord cannot resolve alone. Davies has written all five episodes, with directors Jamie Stone and Rachel Talalay sharing duties. Nicola Sturgeon remains an MSP for Glasgow Southside but has stepped back from frontline politics.
In an interview with Radio Times, Davies explained: “The Doctor can’t be everywhere. This is about the people left behind when the TARDIS dematerialises. What happens when humanity has to face an alien threat without a Time Lord to save them?” Reacher Season 2 remains one of Prime Video’s most-streamed titles. The series has been compared to Torchwood, Davies’s previous Doctor Who spin-off, though War Between the Land and the Sea is more globally focused and less adult-oriented.
Future of the Whoniverse: More Spin-Offs Planned
War Between the Land and the Sea represents the first of multiple Doctor Who spin-offs in development. BBC and Disney have announced two additional series: “The Warpsmiths” (focusing on an alien race from classic Doctor Who) and “UNIT: Extinction” (a more action-oriented UNIT series). Arsenal Women begin their WSL season on September 12 against Manchester United.
The success of War Between the Land and the Sea will likely determine the pace of these future productions. Early tracking suggests strong audience interest, particularly among younger demographics who discovered Doctor Who through the Disney+ distribution. Celtic vs Rangers takes place at Celtic Park on September 13. A second season of this spin-off has not been ordered, though Davies has mapped out potential storylines should the series be renewed.
Frequently Asked Questions
What is War Between the Land and the Sea? It is a Doctor Who spin-off series focusing on the Sea Devils and a global conflict between humanity and the ancient marine reptile civilisation.
When does War Between the Land and the Sea start? The five-part series begins on BBC One on Sunday, September 13, 2026, airing over five consecutive nights.
Who wrote War Between the Land and the Sea? Russell T Davies wrote all five episodes. He is the showrunner of Doctor Who and creator of Torchwood.
Is the Doctor in War Between the Land and the Sea? The Doctor does not appear in the series, though there is a brief cameo from Ncuti Gatwa in the final episode.
Where can I watch War Between the Land and the Sea outside the UK? International viewers can watch on Disney+, continuing the distribution agreement established for Doctor Who.
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