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The War Between the Land and the Sea Episode Guide

Sunday
7th December 2025
8:30PM
BBC One (43 mins)

The War Between - Homo Aqua

Episode 1 of 5 from The War Between the Land and the Sea
Barclay’s ordinary life becomes a world of terror when an ancient species rises from the sea.

Sunday
7th December 2025
9:15PM
BBC One (47 mins)

The War Between - Plastic Apocalypse

Episode 2 of 5 from The War Between the Land and the Sea
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.

Sunday
14th December 2025
8:30PM
BBC One (44 mins)

The War Between - The Deep

Episode 3 of 5 from The War Between the Land and the Sea
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.

Sunday
14th December 2025
9:20PM
BBC One (45 mins)

The War Between - The Witch of the Waterfall

Episode 4 of 5 from The War Between the Land and the Sea
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.

Sunday
21st December 2025
8:05PM
BBC One (53 mins)

The War Between - The End of the War

Episode 5 of 5 from The War Between the Land and the Sea
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?