West Bound Limited (movie, 1937)

Talbot works as a dispatcher at a small rural railway station. One rainy night, shortly after a company payroll has arrived at the station, a masked criminal arrives to steal it. Talbot intercepts the villain's plan and a struggle ensues. He manages to fight off the masked man and save the payroll. But during the fight he is away from his station and misses a call to change the tracks for an oncoming train. This causes a terrible train crash resulting in many lost lives.