1 - 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.

2 - 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.

3 - 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.

4 - 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.

5 - The End of the War