Seasons & Episodes
EP 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
EP 2
Plastic Apocalypse
Barclay becomes humanity's ambassador when the mysterious Salt emerges from the Tank. But his family's life is torn apar
EP 3
The Deep
Barclay makes a terrifying descent into the world of Homo Aqua. Back on the land, Kate stands alone as Downing Street co
EP 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 Gu
EP 5
The End of the War
Barclay stands alone, Salt is lost, UNIT is powerless, and the oceans rise as the war reaches its climax. While traitors
