Major Crimes explores how the American justice system approaches the art of the deals as law enforcement officers and prosecutors work together to score a conviction. Los Angeles Police Captain Sharon Raydor heads up a special squad within the LAPD that deals with high-profile or particularly sensitive crimes.

Lancashire Police's major investigation team and the crimes they investigate, such as armed robbery, rape and murder. From the first call to the crime scene, and to charging the suspects, the cameras capture it all.