Spies, blockades, and covert propaganda turn out to matter as much as battleships once the war grinds into stalemate, since governments now face mutiny, strikes, and civil disobedience on their own home fronts. This episode follows the agents sent to stir unrest inside enemy territory, including the British-backed Arab Revolt that made T.E. Lawrence famous, and Germany's parallel scheme of shipping arms to Irish nationalists ahead of the Easter Rising in Dublin. Both operations aim at the same target: not enemy armies but enemy stability, the assumption that a population under enough pressure will turn on its own government before the front line even moves. The episode traces how intelligence services, still improvising their methods, weigh sabotage and revolution alongside naval blockades as tools of war, and how those tools blur the line between soldiers and civilians. It is part of a larger series on the First World War, and this installment treats the war's quieter machinery, the spies and saboteurs working behind the trenches, as decisive as anything happening in them.