Inside Central Station - Season 4

Change is happening at Glasgow Central, with the beginning of a huge multi-million pound renovation across the Argyll line – bringing with it challenges for passengers and staff alike. A Scotland game at Hampden sees the concourse flooded by football fans but there's not enough trains.

Outwith the station, the Network Rail helicopter takes to the skies to survey the lines around Central for faults. Drew calls in the emergency services to help with a pigeon trapped in the station.

It's Easter weekend and an influx of rival football fans at Glasgow Central puts extra pressure on the staff and transport police as they segregate the fans heading to Hampden. There is a new team member on the concourse as police dog recruit Marvin is put through his paces during training.

Outside Central, the Network Rail ecologists work to help a peregrine falcon nesting on one of their bridges. And the engineering team get to work on the Argyll line track repairs.

A staff absence means the pressure is on for Jackie as she tackles her biggest ever tour, whilst a gaming competition on the concourse causes staff to get competitive.

In the tunnels beneath Central, the engineers tackle complex steel repairs, and the closed lines allows Paul to explore the history of some of Glasgow's forgotten stations. Outside of the station, the team at Polmadie depot work against the clock to get the iconic Caledonian Sleeper back on for its nightly service.

Station staff work to raise awareness of homelessness by hosting a sleep out on the concourse, while staff benefit from a visit from a therapet to boost mental health. The maintenance team deal with a blocked toilet and the engineering teams below ground work to carry out vital repairs to waterproof the tunnels. Paul explores the fascinating history of Glasgow's shipyards and their link to the railway and Jackie and Drew receive exciting news that will have a big impact on the station tours.

The team start work on cleaning up the station's disused Victorian Platform, ready for renovation, but the clear-out comes with its own issues. Up on the concourse, Transport Police tackle drug issues around the station, and station staff receive life-saving training. A special unveiling takes place to honour war veterans, and, out on the tracks, the engineering team tackle one of the biggest sections of work in the Argyll Line closure.

The Argyll Line closure comes to an end as the engineering works are completed. Anderston station and Glasgow Central Low Level reopen, but not without some final hurdles.

Outside of the station, apprentices are put to the test on a night shift at Polmadie. Back on the concourse, a special tea party is organised to celebrate the Queen's Jubilee, while Paul and Jackie go on a trip to Bo'Ness to put in motion their big plans for the future of the tours.