Dragnet focused on police procedure, it became a wildly popular and ground-breaking show.
Dragnet literally refers to methods used by police to catch criminals. After it's introduction to radio, it moved on to become a hit television series. The Dragnet phenomenon lasted for five decades.
Fifty-two episodes aired, spanning two seasons, in 1989. The old time radio detective series remained a series off and on through 2003.
Dragnet returned to television after NBC saw the made for television movie version.