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.
On screen
Top Cast
Russell Tovey
Barclay Pierre-Dupont
Gugu Mbatha-Raw
Salt
Jemma Redgrave
Kate Lethbridge-Stewart
Ruth Madeley
Shirley Bingham
George Robinson
Steve Chesney
Barbara Probst
General Dominique Dussolier
Alexander Devrient
Colonel Christofer Ibrahim
Gethin Alderman
Homo Aqua
Charles Sandford
Homo Aqua
Stewart Alexander
General Oscar Gunsberg
Colin McFarlane
General Austin Pierce
Francesca Corney
Sergeant Hana Chakri
Episodes guide
Seasons
Specials
18 episodes · 2025
Miniseries
5 episodes · 2025
Preview
Official Trailer
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