A Kansas City, Mo., officer pursues a carjacking suspect, and a Lee County, Fla., sergeant responds to a domestic-violence call.

Pittsburgh officers pursue a repeat narcotics offender; a Brevard, Fla., sheriff apprehends a drunken driver.

A Rialto, Cal., officer apprehends a suspect for possessing a concealed sawed-off shotgun; a Brevard County, Fla., deputy pursues a suspected drug dealer.

A Lee County, Fla., deputy stops a man driving a golf cart; a Rialto, Cal., officer assists convenience-store employees who have been assaulted.

Part 1 of 2. Highlights from the first 20 seasons of the series are featured, including cases of suspects resisting arrest. Also: crimes of passion and fan-favorite moments.

Conclusion. Highlights from the first 20 seasons of the series are featured, including chases between officers and suspects. Also: suspects who are under the influence of drugs and alcohol; and police who find themselves in high-risk situations.

A Brevard County, Fla., officer pursues a drug suspect who attempts to flee on foot during a traffic stop; a Riverside County, Cal., deputy responds to a domestic-disturbance call.

A Las Vegas officer confronts a man acting strangely on the Strip; a Lee County, Fla., deputy apprehends a suspect for drug possession.

A Rialto, Cal., detective pursues an intoxicated suspect; a Hillsborough, Fla., deputy makes a traffic stop in an area known for drug-related activity.