Episode 1
Homo Aqua
Barclay's ordinary life becomes a world of terror when an ancient species rises from the sea. As UNIT fights for control, the summit on the Thames reveals terrifying secrets.
Where to watch The War Between the Land and the Sea
TV series
The War Between the Land and the Sea
20251 season7.6 / 10
When a fearsome and ancient species emerges from the ocean, dramatically revealing themselves to humanity, an international crisis is triggered. With the entire population at risk, UNIT step into action as the land and sea wage war.
Availability
Not streaming in United States
Checked Jul 22, 2026
The War Between the Land and the Sea premiered December 7, 2025. We don't have a confirmed streaming, rental or purchase option yet.
Synopsis
When a fearsome and ancient species emerges from the ocean, dramatically revealing themselves to humanity, an international crisis is triggered. With the entire population at risk, UNIT step into action as the land and sea wage war.
Season 1 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
Plastic Apocalypse
Barclay becomes humanity's ambassador when the mysterious Salt emerges from the Tank. But his family's life is torn apart when Salt wreaks revenge upon all mankind.
Where to watch The War Between the Land and the Sea
Episode 3
The Deep
Barclay makes a terrifying descent into the world of Homo Aqua. Back on the land, Kate stands alone as Downing Street conspires with the army to change the course of the war.
Where to watch The War Between the Land and the Sea
Episode 4
The Witch of the Waterfall
Barclay and Salt go on the run in a war-torn London as UNIT reels from disaster. But when Tide threatens the land and Gunsberg advances his plans, the Severance schemes demand blood.
Where to watch The War Between the Land and the Sea
Episode 5
The End of the War
Barclay stands alone, Salt is lost, UNIT is powerless, and the oceans rise as the war reaches its climax. While traitors conspire, can Barclay find Salt before it's too late?
Where to watch The War Between the Land and the SeaEpisode information updated Jul 22, 2026
Available now in United States
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More about The War Between the Land and the Sea
Cast
Russell ToveyBarclay Pierre-Dupont
Gugu Mbatha-RawSalt
Jemma RedgraveKate Lethbridge-Stewart
Ruth MadeleyShirley BinghamRodo GenerAgustin
Alys MetcalfUK Reporter
Patrick BaladiSir Keith Spears
Antonia BernathRose-Marie HuntCredits
- Created by
- Russell T Davies
- Written by
- Russell T Davies, Pete McTighe
Production details
- Status
- Ended
- Series type
- Miniseries
- Episodes
- 5
- Original language
- English
Networks & production
BBC OneUnited Kingdom
Bad WolfUnited Kingdom
BBC Studios ProductionsUnited Kingdom
Themes
alien invasioninterspecies romanceminiseriesoceanseasea creaturesea monsterspin off