How Do They Do It?

The programme examines how Berettas and cotton are produced, detailing each step of their manufacturing processes. It also offers a detailed look at the intricate network of the Paris sewer system, exploring its engineering and historical layers while highlighting the overall complexity.

The programme titled Sewers/Berettas/Cotton is presented as a single episode within its series. It falls under the broader category of a programme and is identified by its focus on specific industrial and infrastructural subjects. In this episode the production stages of two very different items are examined. First, the show walks the viewer through the step‑by‑step manufacturing of Berettas, outlining the key phases that turn raw components into the finished product. It then shifts to the cotton sector, detailing how raw fibre is processed and turned into usable material, highlighting each stage of that transformation. A further portion of the episode turns its attention beneath the streets of Paris, offering a clear view of how the city’s sewer network is organised. It outlines the various layers and connections that make the system operate, giving the audience a sense of the intricacy involved in keeping the underground infrastructure functional. Overall, the episode links together these seemingly unrelated topics by presenting the technical procedures behind the Beretta and cotton manufacturing processes and by providing a concise explanation of the Paris sewer system’s complexity. The structure allows viewers to appreciate the detailed work that underpins both everyday products and essential urban services.