A special festive peek behind the scenes at Glasgow Central. The tree is up, the Christmas shoppers are out and there is a very special visitor to the station concourse.

In this final episode the TRSMT music festival revellers descend on the station late at night, a special guest enjoys the London commute on the Caledonian Sleeper and we meet the oldest and youngest train cleaners in the station. Ex British Transport Police officer, Bob takes a walk back in time to the 80's and we find out what's it's like to police the station today with Sergeant McWhirter. Tattoo artist Lorraine compares working under the Heilanman's umbrella today with the past and a street art mystery is revealed in the Arches bar. Staff deal with disruptions caused by overhead line problems and Drew reflects on how special his town within a city is and what it means to the people of Glasgow.

In this fifth episode, the staff and passengers don their glitter and rainbow colours to celebrate Glasgow Pride - including Virgin customer service assistant Thomas, who arrives on a fabulous rainbow-clad train. Students from the Royal Conservatoire use the concourse as a location for a very special film, and Hashmi reveals some of the stations past in his tailors shop underneath the station. Driver Rab is up bright and early to get to his engine, and cleaner Alistair performs a quick turnaround for the morning rush hour. Paul Simon fans experience a wait on the low level as they head to the Hydro music venue and signaller Brian explains how Victorian engineering and modern technology all work together to keep the network running.

In this fourth episode, temperatures rise in and outside the station as the heat causes points failures and disruptions across the board. Tom and Marie reminisce about their holidays to the coast in the Glasgow Fair and the Comms room work hard to get the bank holiday passengers to their destinations in time. Tour guide Paul reveals the stations wartime past and passenger Margaret remembers being evacuated from Central in WWII. Duty manager Drew has an unusual health and safety check to complete and we meet Alison, one of ScotRail's few female drivers. The lost property office turns up some curious items left behind by passengers and some mischievous guide dog puppies are in training on the concourse.

In this third episode we find out what happens once all the passengers are gone and the station closes its gates for the night. Susan and the staff are entertained by the passengers as Beyonce and Jay Z are in town, Conductor Catherine takes us on a journey over the border and the TransPeninnine staff struggle to get their customers on trains as there is cancellations across the board. There's romance under the clock and Sajid is on his last shift before he retires after 45 years in the station. Can Gold Command keep the network running as Storm Hector causes havoc on the tracks? And will the Beyonce revellers get home safe with no slips, trips and falls?

In this second episode, John and Colette cope with the Scottish Cup final crowds trying to smuggle alcohol on dry trains, and the station staff cope with angry customers as the summer heat causes havoc on the tracks. Tour guide Paul uncovers a Victorian platform deep in the bowels of the building, and we hear how the famous bridge that takes the trains into central got its name. Tricia in the Blue Lagoon chippy gives her Syrian colleague a lesson in Glaswegian, and Craig takes us on a musical journey on the Transpennine Express. Sniffer dog Floyd discovers a suspect package, and Drew puts his security team to the test. What does station manager Susan have to do to rank as number one UK station? And will the ticket office staff get the bank holiday revellers to their destinations on time?

Staff are pushed to the limit by the heat and Storm Hector causing havoc on the tracks, and have to work around the clock to deal with disruptions and delays, football fans and big music events.