The War Between the Land and the Sea Episode Guide
When the oceans finally decide to lodge a formal complaint against humanity, UNIT discovers that guns, submarines and stern-looking conference rooms may not be enough to settle the argument. Unfortunately, those remain the preferred tools of several world leaders.
This episode guide follows the five-part limited series in its original release order, with short, spoiler-light summaries and Skully’s Picks highlighting the strongest instalments. As the story unfolds continuously, the picks are recommendations rather than permission to leap over the connecting chapters.
The War Between the Land and the Sea tells one complete story, beginning with first contact and rapidly expanding into an international crisis involving UNIT, the newly emerged Homo Aqua and one rather overwhelmed logistics manager.
Before you press play: Skipping episodes is not sensible because this is a tightly serialised drama, not a collection of standalone adventures. The summaries avoid each episode’s largest revelations, although later entries inevitably hint at how the conflict develops.
Season 1 (2025) – 5 Episodes
The only season follows Barclay Pierre-Dupont as a chance encounter places him at the centre of negotiations between humanity and Homo Aqua. What begins as cautious diplomacy soon becomes an increasingly volatile struggle involving pollution, military escalation, political manipulation and the growing connection between Barclay and aquatic ambassador Salt.
Episode 1: Homo Aqua
Skully’s Pick
An administrative error draws mild-mannered UNIT employee Barclay into a covert operation after fishermen discover a mysterious aquatic creature in the Mediterranean. When its people emerge and demand negotiations with humanity, their formidable ambassador makes an unexpected choice about who should speak for the land.
Episode 2: Plastic Apocalypse
Salt forces humanity to confront the immense damage it has inflicted upon the oceans, while Barclay struggles to make meaningful progress between two increasingly hostile sides. When government promises fail to satisfy Homo Aqua, the visitors provide the world with a dramatic demonstration of just how much rubbish has been swept conveniently out of sight.
Episode 3: The Deep
Barclay and a UNIT delegation descend into the ocean for direct negotiations with Homo Aqua, carrying the hopes of billions into an environment where humanity holds very few advantages. Back on land, political and military leaders pursue a far more dangerous solution, and suspicions grow that peace may never have been everyone’s objective.
Episode 4: The Witch of the Waterfall
Skully’s Pick
With negotiations in ruins and both sides blaming one another, Salt becomes the focus of an international pursuit. Barclay must decide whether to obey UNIT or trust the ambassador he has come to understand, while manipulated evidence pushes the planet closer to open war.
Episode 5: The End of the War
Homo Aqua retaliates as the conflict reaches its devastating final stage, leaving UNIT desperately searching for a way to prevent a global catastrophe. Barclay continues trying to reach Salt, while Kate Lethbridge-Stewart faces the human cost of decisions made in the name of security and the possibility that peace may now require an almost unbearable reckoning.
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