Episode 4 (S01E04)

Signal issues result in limited service during peak hours, creating significant overcrowding at the station. Just a day later, the same equipment causes further disruptions, ultimately leading to the suspension of the entire line. Jonny and his engineering crew must replace a 60-foot stretch of rail due to a failing clamp, but they’re under pressure to finish the intricate job in just four hours before the morning commute starts.