The War Between the Land and the Sea: Everything to Know About the Doctor Who Spinoff
The world of Doctor Who keeps expanding, and its newest chapter trades the TARDIS for a global crisis rising from the ocean. The War Between the Land and the Sea is a five-part miniseries that puts UNIT front and center as an ancient species emerges from the deep. Created by Russell T Davies, it revives a classic villain and asks a simple question: what happens when the Doctor is nowhere to be found and humanity has to fight on its own? Here is a full breakdown of the show, its cast, and how to watch it.
What the show is about
The premise is built for tension. When a fearsome, ancient species surfaces from the ocean and reveals itself to humanity, an international crisis erupts. These are the Sea Devils, classic Doctor Who monsters first seen back in 1972, now reimagined as an aquatic race sometimes called Homo Aqua. Having slumbered beneath the waves, they wake to find the oceans polluted and humanity careless, and they declare war.
The War Between the Land and the Sea follows UNIT, the military task force that handles alien threats, as it scrambles to prevent global catastrophe. The story centers on Barclay, a low-level UNIT staffer thrust into the role of humanity’s ambassador when a mysterious figure named Salt emerges at a summit on the Thames. It is a disaster-scale drama with real stakes, and it leans into the darker, more adult tone that made the earlier spinoff Torchwood a fan favorite.
The cast
Russell T Davies assembled a strong ensemble, mixing new faces with familiar Whoniverse veterans. The War Between the Land and the Sea stars:
- Russell Tovey as Barclay, the reluctant everyman at the heart of the story
- Gugu Mbatha-Raw as Salt, the enigmatic figure from the deep
- Jemma Redgrave as Kate Lethbridge-Stewart, reprising her Doctor Who role as UNIT’s leader
- Alexander Devrient as Colonel Christofer Ibrahim
- Ruth Madeley as scientific advisor Shirley Anne Bingham
- Colin McFarlane as General Austin Pierce, a role first seen in Torchwood
Interestingly, both Tovey and Mbatha-Raw previously appeared in Doctor Who as different characters during the Tenth Doctor era, so longtime fans get a fun bit of casting history alongside the new roles.
Who made it
The creative team behind The War Between the Land and the Sea is stacked with Doctor Who talent. Russell T Davies serves as creator, showrunner, and co-writer, sharing writing duties with Pete McTighe. Dylan Holmes Williams directs, and the score comes from composer Lorne Balfe. The series is produced by Bad Wolf alongside BBC Studios, with filming taking place across Wales, Cardiff, Spain, and the United States.
It also holds a place in franchise history as the first spinoff of the modern Whoniverse era, joining earlier Earth-based spinoffs like Torchwood, The Sarah Jane Adventures, and Class. Importantly, it was always planned as a self-contained miniseries, so there are no plans for a second season.
The episodes
The War Between the Land and the Sea runs for five episodes, with the premiere and finale written by Davies and the middle three by McTighe. The episode lineup is:
- Homo Aqua
- Plastic Apocalypse
- The Deep
- The Witch of the Waterfall
- The End of the War
Each episode runs roughly 43 to 53 minutes, making the whole series an easy binge over a weekend.
Where to watch it
Here is where things get a little complicated. In the UK, The War Between the Land and the Sea aired on BBC One across December 2025, launching on December 7 and wrapping on December 21. It remains available to stream on BBC iPlayer, and UK viewers can also buy episodes digitally.
Outside the UK, the picture has been murkier. The series was made as a co-production with Disney, and it was expected to land on Disney+ internationally in early 2026. However, the BBC and Disney partnership wound down, and the streaming rollout faced repeated delays. Fans outside the UK have in the meantime turned to buying the series digitally through services like Amazon Video and Apple TV, or importing the DVD and Blu-ray. If you are waiting on a streaming release in your region, it is worth checking Disney+ directly for the latest status, since availability has shifted over time.
Why it matters
The War Between the Land and the Sea is a big swing for the franchise. It brings a classic monster to a new audience, tackles real-world themes like ocean pollution through a science fiction lens, and proves the Whoniverse can carry a story even without the Doctor. Critics responded positively, with particular praise for Jemma Redgrave’s performance and the show’s Torchwood-style blend of spectacle and heart.
For Doctor Who fans, it is essential viewing. For newcomers, it works as a standalone disaster thriller with a strong cast and a clear, gripping premise. Either way, The War Between the Land and the Sea shows there is plenty of life left in this universe, on land and beneath the sea alike.
Key Takeaways
- The War Between the Land and the Sea is a five-part Doctor Who spinoff created by Russell T Davies, following UNIT as the Sea Devils rise from the ocean.
- The classic villains, first seen in 1972, are reimagined as an aquatic species that wakes to find the oceans polluted and declares war on humanity.
- It stars Russell Tovey as Barclay and Gugu Mbatha-Raw as Salt, alongside returning Whoniverse actors Jemma Redgrave, Ruth Madeley, Alexander Devrient, and Colin McFarlane.
- The five episodes are Homo Aqua, Plastic Apocalypse, The Deep, The Witch of the Waterfall, and The End of the War, written by Davies and Pete McTighe.
- In the UK it aired on BBC One in December 2025 and streams on BBC iPlayer; internationally it was tied to Disney+, though that rollout faced delays.
- Outside the UK, fans have been able to buy the series digitally or on disc while awaiting wider streaming availability.
- Planned as a self-contained miniseries with no second season, it drew positive reviews and is often compared to the earlier spinoff Torchwood.
