By the late 1960s a handful of companies known as the Seven Sisters controlled 85 percent of the world's oil reserves; today that figure has fallen to around 10 percent, and this episode traces how that grip was built and how it started to slip. The film follows the hunt for crude across territories that became the new black gold rush, from Middle Eastern concessions to Latin American fields, with archival footage of drilling rigs, tankers, and the executives and geologists who carved up the map. Interviews and period newsreel reconstruct the deals struck between oil majors and local rulers, and the leverage those agreements gave a small circle of corporations over entire national economies. As the second installment in a four-part series, it sits between the cartel's formation and its later unraveling, showing the mechanics of control before nationalist governments and new producers began to claim a larger share. The result is a portrait of how a resource became a geopolitical weapon.