The War Between the Land and the Sea is a British science‑fiction drama and Doctor Who spinoff created by Russell T. Davies. In this five‑episode miniseries, Earth faces an unprecedented crisis when an ancient aquatic species known as the Homo Aqua emerges from the oceans and reveals itself to humanity, threatening global stability and sparking a profound conflict between land and sea. As tension escalates, the international peacekeeping agency UNIT must step in to manage the situation, with negotiators and scientists working to prevent total war and bridge the divide between humans and the underwater species. The series blends political intrigue, environmental themes, and character‑driven drama, exploring how humanity responds when confronted with an entirely new form of life in a high‑stakes battle for coexistence.