A train loses power, causing delays all over the country.

The London Fire Brigade are called when a passenger falls between the platform and a departing train. Aria the hawk is put to work frightening away scavenging pigeons.

Michael responds to a report of a suspicious bag, Mel's quick thinking reunites a split-up family in Leeds, and driver Lee gets his hands on one of Virgin's new Azuma trains that will come into service in 2018.

Christmas holiday plans are knocked off course when a person is hit by a train near Doncaster, and Christmas Eve heralds the start of an ambitious programme of engineering works.