Overnight

S01 E06 • Monday, Mar 26, 2012 • Mar 26

Every night, 10,000 workers descend on the Tube to maintain, repair and clean it. We follow this invisible overnight army as they work against the clock in the four-hour window when the power is off - from hard-working Bulgarian cleaner Vladimir, who is amazed that the British government pays for people not to work, to 23-year-old Harry leading his gang of 'fluffers' picking fibres and lint from the tracks. Meanwhile pest controller Mick is called to a smelly problem at Hounslow Central, while emergency response worker Roy gets inside one of the Underground's disused 'ghost' stations, Down Street.