HUNTER KILLER: A submarine designed to hunt and attack enemy submarines and surface ships using torpedoes. HUNTER KILLERS follows the careers of four daring British submarine captains who risked their lives to ensure the safety of others. Their adventures span the duration of the Cold War, from missions in World War II-era submarines under the Arctic ice to nuclear espionage missions in seas controlled by the Soviet Union. Shocking encounters with Russian spy vessels in British waters and, ultimately, as the communist façade begins to crack, they hold the line against the Kremlin's sea power, playing a central role in the fall of the Berlin Wall. This is the first time they speak publicly about their secret lives in the submarine service. This is the dramatic untold story of Britain's most secretive service.