Secrets of the London Underground (2021)

Episode Overview

Tube enthusiasts might be aware that the Underground boasts 272 stations, but Siddy Holloway has exclusive access to a hidden gem—Tim Dunn is joining her at the 273rd station. This platform, which only serves westbound trains, has no passengers and will never see the public. Nestled on the third floor of a nondescript tower block in west London, it's actually TFL's cutting-edge training facility. Siddy also visits Oval, one of the oldest and friendliest deep-level stations, showcasing its intriguing brick lift shafts, unexpected ventilation systems, and the origins of a global phenomenon that began on a simple station whiteboard. Meanwhile, at the depot, Tim delves into the fascinating realm of experimental trains and has a surprising encounter with hot sauce cultivated right on a tube station platform.