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