20,000 football fans take to the western network for the Champions League Final in Cardiff. Extra trains have been laid on, but getting everyone home after the match is complicated by a major terrorist incident at London Bridge.

Temperatures soar in the height of summer, warping iron tracks and delaying trains. Problems are also caused by trespassers on the line, suspect drug users and an electrocuted pigeon.

The staff step back in time when they venture down into tunnels under the station to carry out fire safety checks, and it is the start of the Bank Holiday getaway for thousands of commuters. Jennie, Great Western Railway's new customer ambassador, manages to seat a troupe of young cheerleaders all together, but faces a much bigger challenge when fire alarms go off during rush hour.

Signal problems lead to a restricted service during rush hour, which causes severe congestion at the station and the same equipment causes more grief 24 hours later - leading to the complete suspension of the line. Jonny and his team of engineers are replacing a 60ft section of rail as one of the clamps holding it in place has weakened, but they have just four hours to complete the complex task before the morning rush begins.

The Queen arrives at Paddington on board one of GWR's new Intercity Express Trains, commemorating a trip made by her forebear Queen Victoria. At Reading station, Revenue Protection Officer Lyn has to call for back up when a fare dodger makes a run for it.

A driver raises the alarm when he suspects that his train has hit something - or someone - on the line, while heavy rain brings down a tree which closes the tracks between Banbury and Oxford. Plus, engineers begin the process of dismantling a Victorian viaduct.

Sunday's service grinds to a halt when a train de-rails in the station, a knife-carrying passenger causes concern in Bristol, and cleaners have to respond as passengers ignore the 'Do not flush while in a station' signs.

Transport Police are called after a passenger urinates in a carriage on a train pulling into the station, a low bridge has to be assessed after it is hit by van, and a train's brakes fail in Reading causing widespread delays.

An intruder puts his life at risk by running along the tracks. Meanwhile, engineers work around the clock to install new cables at Newbury as part of the multi-million pound project. Also, ticket machine refurbishments do not go to plan.

A heatwave hits hard, causing havoc with signalling equipment at Didcot.

The British Transport Police mount a operation to stop criminals who are running drugs out of the capital. Also, a crack has been discovered on a rail joint at Acton East and at Paddington, a passenger has fallen between the train and the platform.

A nasty surprise awaits engineers as they discover rotten wooden sleepers that disintegrate under foot. Even veteran train staff are shocked by the reason the 15:00 to Bristol has come to a halt - A driver tried to start the train from the wrong end.

Weekend works at Acton have overrun, tying up the fast line out of Paddington. Also, a lorry rips the safty barrier off a level crossing as it rubs the lighrs, nd the flying banana trails the rails for defects.

Huge delays occur after a man is hit by a train at Southall, and more chaos occurs when the power out on track is accidentally switched off. Meanwhile, hundreds of train enthusiasts descend on Paddington to see the world famous Flying Scotsman.

The one question Jonah never thought he would answer is finally resolved: did his marriage to Megan ever amount to anything more than a lie? And is the truth enough to lay his grief to rest?

The bank holiday works schedule is disrupted when a trespassers is o the line outside of London, forcing the cancellation of all trains. However, the shutdown allows the engineers onto the track to renew large sections of the rail infrastructure.

Swindon control jump into action when an unexpected WWII bomb is found near the line in Teignmouth, transport police seek a world with a man who jumped onto the track to get something, and team leader Matyn reveals the cost of cleaning up graffiti.

Station assistant Richard handles a medical emergency that may not be what it seems, engineers work round the clock to finish before bad weather hits, and the staff sit down for a Christmas lunch - of curry!

Life at one of the UK's busiest transport hubs. Staff at Paddington are given a moment's notice before the arrival of the prime minister.

A passenger, who has dropped their overnight bag on the tracks, threatens to jump on the live rail to retrieve it. A major power failure causes signal problems.

While the lines are quiet over Christmas a mega-crane is brought in to replace track near Oxford.

Maintenance work is underway on England's longest railway tunnel, as the Victorian infrastructure is adapted to support today's large freight trains. They begin the task of lowering the rail bed and bringing the tracks into the centre of the tunnel.

At Paddington, there's a fire alert as smoke is seen smouldering on the tracks outside the station. In Tiverton, a mile-long stretch of the track on the busy mainline needs to be replaced, but the weather begins to turn.

Staff prepare for a VIP visitor, who turns out to be Prince Harry, while a buckled rail is threatening to disrupt the timetable at Route Control in Swindon. A failed freight train requires a rescue locomotive as delays and cancellations stack up.

This week at Paddington, a high speed train comes to an abrupt halt in the station as there are fears it's collided with something on the track.