The War Between the Land and the Sea
6.2/10
BBC iPlayer Ended Drama • Adventure • Science-Fiction
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.
Where to Watch:
BBC iPlayer
Next Air Time: No upcoming air date
Seasons & Episodes
Season 1
5 episodes
E01
Homo Aqua
Sun, Dec 7 2025 8:30 PM GMT+0000
44 min
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.
E02
Plastic Apocalypse
Sun, Dec 7 2025 8:30 PM GMT+0000
47 min
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.
E03
The Deep
Sun, Dec 14 2025 8:30 PM GMT+0000
44 min
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.
E04
The Witch of the Waterfall
Sun, Dec 14 2025 8:30 PM GMT+0000
45 min
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.
E05
The End of the War
Sun, Dec 21 2025 9:00 PM GMT+0000
54 min
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?