Episode 4 (S03E04)

The team at Central is continually evolving to keep pace with modern advancements, particularly focusing on the electrification of the railways. On-site, the engineering crew is working swiftly to construct a massive new structure, while an ecologist from the rail network observes the impact of this work on the surrounding wildlife. Meanwhile, station tour guide Paul delves into the rich history of Glasgow's tram system. Over on the West Coast Mainline, the Avanti team is pulling out all the stops in their quest to shatter a long-held speed record.