Season 4

In Ohio, SWAT tears down a house to arrest two brothers wanted for murder. In Washington, a high-speed pursuit ends when a crash entangles an officer's car in live electrical cables. In Texas, a DWI driver hits a goods train carrying explosive chemicals.

In Colorado, an unpredictable armed ex-convict takes his family hostage and threatens to kill them and himself. In Florida, a gas station robbery leads to a life-threatening attack on a police officer and a night-time manhunt in the woods.

An armed robber starts a deadly shootout on a city bus in Maryland. A California police officer races to drag a man from a wheelchair stuck on a train level crossing. In Ohio, police officers attempt to rescue a woman trapped inside a raging house fire.

A car crash ignites a fireball that threatens a Maryland officer making a traffic stop. In Ohio, an armed burglar hides in a closet, and officers must smoke him out. In Texas, an officer confronts a wanted felon who suddenly pulls a gun on him.

In Florida, a man is shot dead with a single bullet to the chest. It looks like a murder, but the inquiry takes a surprising turn. In Oklahoma, a high-speed pursuit turns rescue mission as the chase ends in a fiery crash.

An undercover agent buying drugs and guns from Florida gangs finds himself at the wrong end of the barrel. A young mom and her kids are about to be swept away by a sudden torrent, and a truck plows recklessly through rural Ohio.

A Washington State car chase ends with a shootout and a K9 fighting for its life. Pensacola police officers attempt CPR on a drowned 3-year-old girl, and a convoy of Ohio police cruisers scream through downtown Columbus in pursuit of their own car.

Hundreds run in terror as a gunman opens fire in an Indiana bingo hall.

A home invasion ends in a shootout, and a robbery escalates into a manhunt.

A routine traffic stop turns violent, and police conduct a frantic search