21ST PRECINCT was one of the realistic police drama series of the early- to mid-1950's that were aired in the wake of DRAGNET. Hard-boiled private detective series that often portrayed police as inept or incompetent were losing favor. NBC's DRAGNET had proven that a realistic police show could attract and hold an audience.

NOTE:  The official title of the series according to the series scripts and the CBS series promotional materials was 21ST PRECINCT and not TWENTY-FIRST PRECINCT or TWENTY FIRST PRECINCT which appears in many Old-Time Radio books. In 1953 CBS decided to use New York City as the backdrop for their own half-hour police series and focus o  the day-to-day operations of a single police precinct.  Actual cases would be used as the basis for stories.