The War Between the Land and the Sea
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.
tv Seasons & Episodes
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.
Dec 7, 2025
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.
Dec 7, 2025
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.
Dec 14, 2025
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.
Dec 14, 2025
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?
Dec 21, 2025
people Cast
Russell Tovey
Barclay Pierre-Dupont
Gugu Mbatha-Raw
Salt
Jemma Redgrave
Kate Lethbridge-Stewart
Alexander Devrient
Colonel Christofer Ibrahim
Ruth Madeley
Shirley Bingham
Colin McFarlane
General Austin Pierce
Waseem Mirza
Manpreet Bachu
Waleed Hammad
Colonel Tariq Hashim
Vincent Franklin
Prime Minister Harry Shaw
Adrian Lukis
Sir Jonathan Hynes
Gethin Alderman
Homo Aqua
apartment Production Companies
Bad Wolf
BBC Studios Productions