Step inside a busy 1950s New York station house with 21st Precinct, the documentary-style CBS police drama that follows a case from the first phone call to the final report. In "The Certified 600," a burglary and a wrecked car take a strange turn when a caller phones in claiming to hold the stolen safe -- and demanding ransom to give it back. Captain Kennelly's men work the timeline, trace the call, and close in on a thief with a surprising connection to the victim.