When Soviet forces sealed off West Berlin's roads and railways in 1948, the city's two million residents faced starvation within weeks. This film tracks the response: RAF transport crews flying round-the-clock supply runs into Gatow airfield, carrying coal, flour, and medicine through some of the tightest air corridors ever flown under pressure. Sunderland flying boats, repurposed from maritime patrol duty, land supplies directly on Lake Havel when runway capacity cannot keep up with demand. Archival footage shows the loading crews, the control towers tracking aircraft landing at intervals of minutes, and the Berliners waiting on the ground as the blockade drags into winter. The film also follows the RAF's presence in the city beyond 1949, into the 1960s, when Chinook helicopters joined the fixed-wing fleet still supporting the garrison. Told through period footage and expert commentary, it traces how an improvised emergency operation became one of the defining confrontations of the early Cold War, resolved without a shot fired.