Staff face their busiest and most unusual shift on New Year's Eve, the only night when trains run for 24 hours and a million passengers are expected to be using the network. At Piccadilly Circus, customer assistants Lewis and Rory have to deal with passengers relieving themselves on the escalators, while almost 200,000 people are pouring through the gates of Embankment to watch a firework display. In the central control room, senior operating officer Dan gets a report of a suspect package on Waterloo Bridge, while incident response manager Richie is called out to an apparent stabbing at St Paul's.