In this episode, customer service assistant Josie shows off her new information desk and gives an insight into the challenges of working at Central station. Meanwhile, tour guide Paul goes behind the scenes to explain how the railways helped standardise time across the whole of the country. Some long-time station regulars take a day trip to Largs, while Derek handles a train delay caused by a four-line blockage. Seven-year-old piano maestro Nathan entertains passengers at Central station, while across the concourse at the Grand Central Hotel, Dr Emily Munro reveals how the hotel played a fundamental role in the history of television. Tour guide Jackie uncovers some vintage station clocks and recruits engineer Frank to get them working again. Around the station, new staff are learning the ropes, with trainee dispatcher Lauren hoping to go solo after her exams and trainee train driver Kevin preparing for his final assessments - will they both pass?