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.
The War Between the Land and the Sea (Season 1)
Homo Aqua (Episode 1) 6.0
Writer: Russell T Davies
Air date: 2025-12-07
Runtime: 44 min
Overview: 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.
Plastic Apocalypse (Episode 2) 6.2
Writer: Pete McTighe
Air date: 2025-12-07
Runtime: 48 min
Overview: 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.
The Deep (Episode 3) 5.3
Writer: Pete McTighe
Air date: 2025-12-14
Runtime: 45 min
Overview: 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.
The Witch of the Waterfall (Episode 4) 4.9
Writer: Pete McTighe
Air date: 2025-12-14
Runtime: 46 min
Overview: 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.
The End of the War (Episode 5) 4.5
Writer: Russell T Davies
Air date: 2025-12-21
Runtime: 54 min
Overview: 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?
Seasons
Episodes 5