One thing leads to another might be an apt description of this film. Bank clerk, bus stop, trolley bus, magistrates court, newspaper reporter, blackmail, and so on, eventually ending up at the bus stop again. Nice to see all those old favourite actors again. Incidentally the music used in the opening and closing credits is 'Automation' by Dutch composer Hugo de Groot which was also used in the 1950s BBC TV police series 'Fabian of the Yard'.