Kuala Lumpur anchors this episode of the World's New Megacities series, tracking how Malaysia's capital has grown from colonial-era streets into a skyline of glass towers. The film moves between the city's historic districts, where older shophouses and markets still operate, and the vertical business core that has risen around them, using this contrast to frame Malaysia's broader economic transformation. Interviews with residents and workers give a sense of daily life inside the density, from commuters navigating the transit system to families keeping traditions alive amid new construction. Architecture gets particular attention, with footage of the skyscrapers that have made Kuala Lumpur one of Southeast Asia's most recognizable skylines. The documentary treats the city as a case study in rapid urbanization, showing how planning decisions, migration, and investment have reshaped a relatively small colonial trading post into a regional hub. It is one episode in a series profiling fast-growing cities around the world.