The Wire

The Wire is my favorite TV show of all time.  Each season of The Wire focuses on a different facet of the city of Baltimore.  In season 4, cryptography is used.  Drug kingpin Marlo Stanfield develops a special type of code to communicate with other people in his gang.  He and his men take photographs of clocks and send them via picture message.  The number at which the hour and minute hands point to represents a location using coordinates.  The Baltimore police department works extremely hard to break the code.  They are given permission to use a wiretap and after weeks and weeks of hard work, the code is broken.  As a result, Stanfield is convicted and sentenced to a a lot of time in prison.