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.

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.

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.

As Storm Eleanor strikes, a fly-away plastic bag causes a power outage trapping three trains, and in Hungerford a falling tree hits a Penzance bound service.

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.

Lost power between Didcot and Paddington causes problems. A truck strikes a railway bridge. A woman has a cardiac arrest at a ticket barrier. In the wake of the Salisbury nerve agent scare, containers of a unknown chemical found on board a train.

British Transport Police chase down a mysterious trespasser known as Spiderman. The Great Western Railway's top brass holds a naming ceremony for a new electric train, but the new route requires demolishing a 120-year-old footbridge in only 72 hours.

At Paddington, the early morning service from Swansea breaks down and causes major disruption during the morning rush hour. Meanwhile, the staff face further challenges with a string of medical emergencies at the station and sabotage on the tracks.

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.

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.

A track circuit failure closes a platform which is used by high-speed trains, British Transport Police are out in force as rival Oxford and Millwall fans use the network, and a young man is seen on CCTV walking close to the edge of the platform.

The trains to the Cheltenham Races are standing room only, even in first class. Potential flooding at Cowley Bridge could cut off all of Devon from the networ. Emma uses thermal imaging to inspect the lines for defects from a helicopter.

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.

The real-life crime series has unprecedented access to a covert surveillance operation, which culminates in 10 simultaneous armed dawn raids against organised crime gangs.

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?

A fatality on the line at Slough station means closing the station and the line, leading to a standstill. A Thai princess and her entourage are eager for a tour of the station. Thieves have robbed a scrap yard and used the railway track to get away.

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.